“Let sleeping dogs lie,” your grandmother might have warned — and without knowing it, she handed you one of the most enduring idioms in the English language.
Dogs have lived alongside humans for thousands of years, so it’s no surprise they’ve left their paw prints all over the way we speak. From the scrappy underdog fighting against the odds to the sweltering dog days of summer, dog idioms pop up in everyday conversation, literature, and even business English.
In this guide, you’ll find 45+ dog idioms — each with a clear meaning, two example sentences, and alternative ways to express the same idea. Whether you’re an English learner, a writer looking for the perfect phrase, or simply curious about where these expressions come from, this collection has you covered.
Let’s dig in!
What Are Dog Idioms?
Dog idioms are figurative expressions that use dogs or dog-related imagery to describe human behavior, emotions, or situations. They don’t literally involve dogs — instead, they borrow qualities we associate with them, like loyalty, tenacity, or even laziness.
English is packed with animal idioms, but dogs claim more of them than almost any other creature. That makes sense when you consider how deeply dogs are woven into human culture, work, and family life.
Understanding idioms about dogs will sharpen your conversational English and add color to your writing. Below, you’ll find them organized into thematic groups so you can jump straight to the ones you need.
Common Dog Idioms About Behavior and Attitude
These are the dog idioms you’ll hear most often in daily conversation. They describe common behaviors, warnings, and attitudes.
1. Let Sleeping Dogs Lie
Meaning: Don’t bring up an old problem or conflict — leave things as they are to avoid unnecessary trouble.
Example Sentences:
- I thought about asking my boss why I was passed over for the promotion, but I decided to let sleeping dogs lie.
- They settled the argument weeks ago, so it’s better to let sleeping dogs lie than reopen old wounds.
Other Ways to Say It: Leave well enough alone / Don’t stir the pot / Don’t rock the boat
2. Every Dog Has Its Day
Meaning: Everyone gets a moment of success or luck at some point in their life.
Example Sentences:
- She’s been working on her novel for years with no recognition, but every dog has its day.
- Don’t count him out just because he lost the first round — every dog has its day.
Other Ways to Say It: Your time will come / What goes around comes around / Fortune favors the patient
3. You Can’t Teach an Old Dog New Tricks
Meaning: It’s difficult to make someone change long-established habits or learn new skills late in life.
Example Sentences:
- My grandfather refuses to use a smartphone — I guess you can’t teach an old dog new tricks.
- The company tried switching to a new software system, but half the senior staff proved you can’t teach an old dog new tricks.
Other Ways to Say It: Set in their ways / Stuck in a rut / Old habits die hard
4. Barking Up the Wrong Tree
Meaning: Pursuing a mistaken or misguided course of action; accusing or blaming the wrong person.
Example Sentences:
- If you think I’m the one who leaked the news, you’re barking up the wrong tree.
- She spent weeks researching the wrong topic for her thesis — totally barking up the wrong tree.
Other Ways to Say It: On the wrong track / Looking in the wrong place / Chasing a red herring
5. His Bark Is Worse Than His Bite
Meaning: Someone who seems threatening or angry is actually harmless.
Example Sentences:
- Don’t worry about Coach Miller’s yelling — his bark is worse than his bite.
- My landlord sends scary-sounding emails, but his bark is worse than his bite. He’s actually quite reasonable in person.
Other Ways to Say It: All talk and no action / A paper tiger / Talks tough but is harmless
6. Call Off the Dogs
Meaning: Tell people to stop attacking, pursuing, or pressuring someone.
Example Sentences:
- The CEO finally called off the dogs and told the legal team to drop the lawsuit.
- After three rounds of aggressive questioning, the interviewer called off the dogs and switched to lighter topics.
Other Ways to Say It: Back off / Ease up / Pull back the troops
7. The Tail Wagging the Dog
Meaning: A small or unimportant part of something is controlling or influencing the whole.
Example Sentences:
- Letting one angry customer dictate the entire company policy is the tail wagging the dog.
- When interns are making the strategic decisions, you know it’s the tail wagging the dog.
Other Ways to Say It: The cart before the horse / Priorities are backwards / Putting the minor before the major
8. Hair of the Dog
Meaning: Drinking a small amount of alcohol to cure a hangover — using more of what caused the problem as a remedy.
Example Sentences:
- He ordered a Bloody Mary at brunch and called it “hair of the dog.”
- I don’t believe in hair of the dog — I just drink water and wait it out.
Other Ways to Say It: A morning-after drink / Fighting fire with fire / The cure that caused the disease
Dog Idioms About Loyalty and Friendship
Dogs are famous for their devotion, so it makes sense that many idioms about dogs center on loyalty — and what happens when it’s broken.
9. A Man’s Best Friend
Meaning: Dogs are considered the most loyal and dependable companions to humans.
Example Sentences:
- When everyone else let him down, his golden retriever proved once again that a dog is a man’s best friend.
- There’s a reason they say dogs are a man’s best friend — no one else greets you that happily at the door.
Other Ways to Say It: A loyal companion / A faithful friend / A devoted partner
10. Puppy Love
Meaning: An innocent, shallow, or short-lived romantic attraction, usually experienced by young people.
Example Sentences:
- Their parents dismissed the relationship as puppy love, but the two teenagers were completely smitten.
- Looking back, my first crush in seventh grade was nothing more than puppy love.
Other Ways to Say It: A schoolyard crush / Young love / Infatuation
11. Follow Someone Like a Lost Puppy
Meaning: To follow someone around constantly and devotedly, often in a needy or clingy way.
Example Sentences:
- Ever since she joined the team, the new intern has followed the manager around like a lost puppy.
- He followed her like a lost puppy at the party, and she didn’t seem to mind one bit.
Other Ways to Say It: Tag along everywhere / Cling like a shadow / Stick to someone like glue
12. Dog-Eat-Dog World
Meaning: A fiercely competitive environment where people will do anything to succeed, even at others’ expense.
Example Sentences:
- The tech startup scene is a dog-eat-dog world — if you don’t move fast, someone else will steal your idea.
- She learned early on that corporate law is a dog-eat-dog world where friendships take a backseat to billable hours.
Other Ways to Say It: Cutthroat competition / Survival of the fittest / Every man for himself
13. Throw Someone to the Dogs
Meaning: To abandon someone or sacrifice them to protect yourself, especially when they’re facing criticism or punishment.
Example Sentences:
- When the scandal broke, the politician threw his aide to the dogs and denied any involvement.
- I can’t believe they threw her to the dogs instead of standing behind her report.
Other Ways to Say It: Throw under the bus / Hang out to dry / Leave to fend for themselves
14. Loyal as a Dog
Meaning: Extremely faithful and devoted to someone, through good times and bad.
Example Sentences:
- Marcus has been loyal as a dog to the company, turning down three higher-paying offers over the years.
- She’s been loyal as a dog to her best friend, showing up for every single milestone.
Other Ways to Say It: Faithful to the core / Devoted beyond measure / True blue
Dog Idioms About Hard Work and Struggle
From exhaustion to determination, these idioms about dogs capture what it feels like to grind, struggle, and push through.
15. Underdog
Meaning: A person or team expected to lose or seen as having little chance of winning.
Example Sentences:
- Nobody gave the underdog a chance, but they pulled off one of the greatest upsets in tournament history.
- She loves rooting for the underdog — there’s nothing more satisfying than watching the unlikely winner celebrate.
Other Ways to Say It: Long shot / Dark horse / The one nobody expected
16. Work Like a Dog
Meaning: To work extremely hard, often for long hours with little rest.
Example Sentences:
- She worked like a dog all summer to save enough money for her first semester of college.
- The construction crew worked like dogs to finish the building before the deadline.
Other Ways to Say It: Slave away / Burn the midnight oil / Work your fingers to the bone
17. Dog-Tired
Meaning: Completely exhausted; so tired you can barely move.
Example Sentences:
- After running the marathon, I was dog-tired and collapsed on the couch for the rest of the day.
- The nurses were dog-tired after a 14-hour shift, but they still managed a smile for each patient.
Other Ways to Say It: Dead on your feet / Bone-tired / Absolutely wiped out
18. In the Doghouse
Meaning: In trouble or out of favor with someone, usually because of something you did wrong.
Example Sentences:
- He forgot their anniversary, and now he’s in the doghouse for at least a week.
- After missing the project deadline, I was definitely in the doghouse with my manager.
Other Ways to Say It: In hot water / On someone’s bad side / In the penalty box
19. Lead a Dog’s Life
Meaning: To live a miserable, unhappy, or difficult existence.
Example Sentences:
- Before the revolution, the factory workers led a dog’s life — long hours, low pay, and no rest.
- He complained that commuting three hours a day made him feel like he was leading a dog’s life.
Other Ways to Say It: Have a hard life / Live a wretched existence / Scrape by miserably
20. Dog Days of Summer
Meaning: The hottest, most uncomfortable days of summer, typically in July and August.
Example Sentences:
- During the dog days of summer, the only relief was sitting under the oak tree with a cold glass of lemonade.
- Sales always slow down during the dog days of summer — nobody wants to shop in that kind of heat.
Other Ways to Say It: The peak of summer / The sweltering season / Midsummer heat
21. Fight Like Cats and Dogs
Meaning: To argue or quarrel frequently and intensely.
Example Sentences:
- My two brothers fight like cats and dogs over the smallest things, but they’d do anything for each other.
- The marketing and sales teams fought like cats and dogs over the new campaign strategy.
Other Ways to Say It: Bicker constantly / Be at each other’s throats / Go at it nonstop
22. Dogged Determination
Meaning: Persistent, stubborn effort that refuses to give up no matter what obstacles arise.
Example Sentences:
- It was her dogged determination that got her through medical school while raising two kids.
- The detective’s dogged determination to solve the cold case finally paid off after eighteen years.
Other Ways to Say It: Relentless persistence / Stubborn resolve / Unyielding grit
23. Go to the Dogs
Meaning: To deteriorate; to become much worse in quality or condition.
Example Sentences:
- The once-beautiful park has really gone to the dogs — there’s litter everywhere and half the benches are broken.
- Since the original owner retired, the restaurant has gone to the dogs.
Other Ways to Say It: Go downhill / Fall apart / Go to ruin
Funny and Playful Dog Idioms
Not all dog idioms are serious. These playful expressions add humor and personality to your conversations.
24. It’s a Dog’s Dinner (Dog’s Breakfast)
Meaning: A messy, chaotic, or poorly done piece of work.
Example Sentences:
- The first draft of the report was a complete dog’s dinner — no structure, no data, no conclusion.
- Have you seen the state of the kitchen? It looks like a dog’s breakfast in there.
Other Ways to Say It: A total mess / A train wreck / A shambles
25. Put on the Dog
Meaning: To dress up, show off, or make a big display of wealth or style.
Example Sentences:
- They really put on the dog for the gala — limousine, designer gowns, the whole package.
- You don’t need to put on the dog just for a backyard barbecue.
Other Ways to Say It: Dress to the nines / Show off / Pull out all the stops
26. See a Man About a Dog
Meaning: A humorous excuse used to avoid explaining where you’re going, often to the restroom or for a secret errand.
Example Sentences:
- “Where are you headed?” “Oh, just going to see a man about a dog.”
- Whenever he needed a smoke break, he’d say he had to see a man about a dog.
Other Ways to Say It: Step out for a minute / Take care of something / Mind my own business
27. Hot Dog!
Meaning: An exclamation of excitement, surprise, or delight (mostly American English, somewhat old-fashioned).
Example Sentences:
- Hot dog! We actually won the raffle — I never win anything!
- “You got the promotion?” “Hot dog! That’s amazing news!”
Other Ways to Say It: Wow! / Awesome! / Well, how about that!
28. The Dog Ate My Homework
Meaning: A classic, obviously unbelievable excuse for failing to complete a task or responsibility.
Example Sentences:
- When the client asked why the deliverable was late, “the dog ate my homework” wasn’t going to cut it.
- “I left my report on the bus” sounds a lot like the dog ate my homework.
Other Ways to Say It: A lame excuse / A flimsy alibi / The oldest excuse in the book
29. Puppy-Dog Eyes
Meaning: A sad, pleading facial expression used to win sympathy or get what you want.
Example Sentences:
- My daughter gave me those puppy-dog eyes, and I caved and bought her the ice cream.
- Don’t give me those puppy-dog eyes — you’re still not borrowing my car tonight.
Other Ways to Say It: A pleading look / Bambi eyes / A begging expression
30. Let the Dog See the Rabbit
Meaning: Get out of the way and let someone do what they’re good at; give the expert room to work.
Example Sentences:
- Stop micromanaging the developer — let the dog see the rabbit and the app will be done by Friday.
- “Can everyone step aside? Let the dog see the rabbit,” said the plumber, rolling up his sleeves.
Other Ways to Say It: Step aside / Let the pro handle it / Give them room to work
31. Sick as a Dog
Meaning: Extremely ill; feeling terrible.
Example Sentences:
- I ate some bad oysters and was sick as a dog for three days straight.
- She came to work anyway, even though she was sick as a dog with the flu.
Other Ways to Say It: Under the weather / Feeling awful / Terribly ill
Dog Idioms About Bad Luck and Tough Times
When life gets rough, English speakers often reach for dog expressions to describe hardship, misfortune, and defeat.
32. Die Like a Dog
Meaning: To die in a miserable, lonely, or undignified way; to meet a shameful end.
Example Sentences:
- The villain in the movie died like a dog — alone in a ditch with no one to mourn him.
- He said he’d rather fight back than sit quietly and die like a dog.
Other Ways to Say It: Meet a wretched end / Die in disgrace / Perish without honor
33. Not Have a Dog’s Chance
Meaning: To have absolutely no chance of succeeding.
Example Sentences:
- With only two players left on the field, our team didn’t have a dog’s chance of winning.
- He applied for the director role with zero experience — he didn’t have a dog’s chance.
Other Ways to Say It: Not a snowball’s chance / Not a prayer / Zero hope
34. Raining Cats and Dogs
Meaning: Raining extremely heavily.
Example Sentences:
- We canceled the picnic because it was raining cats and dogs all morning.
- Grab your umbrella — it’s raining cats and dogs out there.
Other Ways to Say It: Pouring down / Coming down in buckets / A downpour
35. Meaner Than a Junkyard Dog
Meaning: Extremely aggressive, hostile, or bad-tempered.
Example Sentences:
- The rival coach is meaner than a junkyard dog when his team is losing.
- Don’t cross Mrs. Henderson before she’s had her coffee — she’s meaner than a junkyard dog.
Other Ways to Say It: Tough as nails / Fierce as a lion / Nasty tempered
36. A Dog in the Manger
Meaning: A person who prevents others from enjoying something that they themselves have no use for.
Example Sentences:
- He won’t play the piano and won’t let anyone else use it either — what a dog in the manger.
- Don’t be a dog in the manger. If you’re not going to the concert, give your ticket to someone who wants to go.
Other Ways to Say It: A selfish spoilsport / Spiteful hoarder / Neither use it nor share it
37. Like a Dog With a Bone
Meaning: Refusing to let go of something; stubbornly persistent about a topic or task.
Example Sentences:
- Once the journalist found a lead, she was like a dog with a bone and wouldn’t stop digging.
- My toddler was like a dog with a bone about wanting chocolate cake for breakfast — he just wouldn’t drop it.
Other Ways to Say It: Relentless / Won’t let it go / Single-minded
Old and Literary Dog Idioms
These expressions carry more history and literary weight. Some date back centuries, and a few have roots in Shakespeare himself.
38. Cry Havoc and Let Slip the Dogs of War
Meaning: To unleash chaos or signal the start of a fierce conflict. Originally from Shakespeare’s Julius Caesar.
Example Sentences:
- When the CEO fired half the board, it was clear she had cried havoc and let slip the dogs of war.
- The general’s order was essentially “cry havoc and let slip the dogs of war” — there would be no holding back.
Other Ways to Say It: Declare all-out war / Unleash chaos / Open the floodgates
39. Give a Dog a Bad Name
Meaning: Once someone’s reputation is damaged, it’s very hard to restore — the label tends to stick.
Example Sentences:
- He made one mistake at work five years ago, and they gave the dog a bad name. Nobody trusts him with big projects now.
- In politics, it’s easy to give a dog a bad name and watch the mud stick for a whole career.
Other Ways to Say It: Tarnish someone’s reputation / Label someone unfairly / Smear someone’s name
40. The Black Dog
Meaning: A metaphor for depression or a prolonged period of deep sadness. Famously used by Winston Churchill to describe his own depressive episodes.
Example Sentences:
- After losing his job, the black dog followed him for months before he finally sought help.
- Churchill referred to his depression as “the black dog,” and the phrase has stayed with us ever since.
Other Ways to Say It: A dark cloud / A bout of depression / A shadow over the mind
41. A Shaggy Dog Story
Meaning: A long, drawn-out joke or anecdote with a deliberately pointless or anticlimactic ending.
Example Sentences:
- Uncle Dave told one of his famous shaggy dog stories at dinner, and the punchline made everyone groan.
- What started as an exciting meeting turned into a shaggy dog story — forty-five minutes of buildup with no real conclusion.
Other Ways to Say It: A long-winded tale / A story that goes nowhere / An anticlimactic joke
42. Lie Down With Dogs, Wake Up With Fleas
Meaning: If you associate with bad people, you’ll pick up their bad habits or suffer the consequences.
Example Sentences:
- I warned him about getting involved with that crowd. Lie down with dogs, wake up with fleas.
- She learned the hard way — after joining the shady investment group, she woke up with fleas and a damaged credit score.
Other Ways to Say It: You are the company you keep / Bad company corrupts good character / Birds of a feather flock together
43. Dog and Pony Show
Meaning: An elaborate, flashy presentation designed more to impress than to inform; something showy but lacking substance.
Example Sentences:
- The investors saw right through the dog and pony show — they wanted real financial data, not animated slides.
- Every quarterly review feels like a dog and pony show instead of an honest assessment of where we stand.
Other Ways to Say It: A flashy performance / All sizzle and no steak / A smoke-and-mirrors presentation
44. Top Dog
Meaning: The most important, powerful, or dominant person in a group or organization.
Example Sentences:
- After the merger, it was clear who the top dog in the new company would be.
- In our neighborhood growing up, Ricky was the top dog — every kid followed his lead.
Other Ways to Say It: The big boss / The head honcho / The one in charge
45. Dog Watch
Meaning: A late-night or early-morning shift, especially one considered undesirable. Originally a nautical term for a short duty shift on a ship.
Example Sentences:
- Nobody wanted the dog watch — four hours of staring at screens between midnight and 4 a.m.
- As the newest officer on the team, she always got stuck with the dog watch.
Other Ways to Say It: The graveyard shift / The night watch / The late shift
46. Like a Dog With Two Tails
Meaning: Extremely happy; thrilled beyond words.
Example Sentences:
- When he found out he passed the bar exam, he was like a dog with two tails.
- The kids were like dogs with two tails on Christmas morning, tearing through their presents.
Other Ways to Say It: Over the moon / On cloud nine / Absolutely thrilled
How to Use Dog Idioms in Your Writing
Knowing dog idioms is one thing. Using them well is another. Here are a few tips to help you weave these expressions naturally into your writing and speech.
Match the tone. Phrases like “dog and pony show” and “sick as a dog” are casual. They work in blog posts, dialogue, and informal emails — but not in a legal brief or an academic paper. On the other hand, “dogged determination” fits comfortably in formal writing.
Don’t overdo it. One or two well-placed idioms make your writing vivid. Five in a single paragraph make it feel forced. Use them like seasoning — a little goes a long way.
Provide context for learners. If you’re writing for an international audience, don’t assume everyone knows what “in the doghouse” means. A quick parenthetical explanation — or the surrounding context — can make all the difference.
Swap clichés for fresher picks. Expressions like “raining cats and dogs” are so common they’ve lost some impact. Try pairing a well-known idiom with a less familiar one (like “like a dog with two tails”) to keep your writing interesting.
For more figurative language ideas, check out our guides on bird idioms and fish idioms. If you’re exploring idioms from the natural world, our collection of rose idioms is worth a look too.
Frequently Asked Questions
What are the most common dog idioms in English?
Some of the most widely used dog idioms include “let sleeping dogs lie,” “barking up the wrong tree,” “underdog,” “dog days of summer,” and “every dog has its day.” These appear frequently in everyday conversation, news media, and popular culture. You’ll also hear “in the doghouse,” “work like a dog,” and “raining cats and dogs” on a regular basis.
What does “let sleeping dogs lie” mean?
“Let sleeping dogs lie” means you should avoid bringing up an old problem, argument, or situation that has been settled. Stirring things up could create unnecessary conflict. For example, if two coworkers resolved a disagreement months ago, a third person shouldn’t bring it up again — it’s better to let sleeping dogs lie.
How do I use dog idioms in everyday conversation?
The key is context. Use dog idioms when the situation naturally calls for one. If a friend is exhausted after a long day, “dog-tired” fits perfectly. If someone is pursuing the wrong lead, say they’re “barking up the wrong tree.” Avoid forcing them into formal settings — most dog idioms are best suited for casual conversation, creative writing, and informal messaging.
What is the difference between “underdog” and “top dog”?
These two idioms are opposites. An underdog is someone who is expected to lose or is at a disadvantage — think of a small team facing the reigning champions. A top dog is the person in charge or the dominant figure in a group. In a workplace, the CEO is the top dog, while the scrappy startup competing against a tech giant is the underdog.
Are dog idioms used in formal writing?
Most dog idioms lean informal, so they’re more common in creative writing, journalism, marketing, and casual communication. However, some — like “dogged determination,” “underdog,” and “dog and pony show” — have crossed into business and formal writing because they communicate ideas efficiently. When in doubt, read the room and consider whether your audience expects a more polished tone.
Practice Exercises
Fill in the blanks with the most fitting dog idiom from this article.
- She’s been studying day and night for the exam. She’s really been __________.
- After he forgot their anniversary, he was definitely __________.
- The team nobody believed in turned out to be the __________ of the entire tournament.
- If you think I took your parking spot, you’re __________.
- My uncle told one of his famous __________ — twenty minutes of setup for the worst punchline ever.
- The old theater has __________ — the seats are torn and the lobby smells like mildew.
- I ate street food in the market and was __________ for the next two days.
- During the __________, even the dog won’t go outside for a walk.
- The kids __________ about who gets the front seat every single car ride.
- Don’t bring up the budget issue again — just __________.
- When she got the acceptance letter, she was __________.
- The CEO’s quarterly presentation was nothing but a __________ — all flash, no substance.
Answer Key
- working like a dog
- in the doghouse
- underdog
- barking up the wrong tree
- shaggy dog stories
- gone to the dogs
- sick as a dog
- dog days of summer
- fight like cats and dogs
- let sleeping dogs lie
- like a dog with two tails
- dog and pony show
Conclusion
From “let sleeping dogs lie” to “like a dog with two tails,” these 45+ dog idioms cover nearly every corner of the English language — loyalty, struggle, humor, and everything in between. Dogs have earned their place not just in our homes, but in our everyday speech.
Whether you’re sharpening your English skills or searching for the perfect phrase to bring a story to life, the right idiom can turn an ordinary sentence into one that sticks with your reader.
Try dropping a few of these into your next conversation or writing project. And if you’re hungry for more figurative language, explore our guides on animal idioms, cat idioms, and butterfly idioms for even more inspiration.
