Dog Idioms and Sayings From Around the World, Explained

Dogs have shaped human language for centuries — English alone has dozens of dog-related idioms most people use without ever wondering where they came from. Here's the real story behind the most common ones, plus a few gems from other languages.

Common English Dog Idioms

1. "Let sleeping dogs lie" — meaning don't bring up an old problem that's been resolved. It dates back to medieval literature; disturbing a sleeping dog was considered a genuinely bad idea long before the phrase became figurative.
2. "Raining cats and dogs" — used for extremely heavy rain. Its exact origin is debated, but one leading theory ties it to 17th-century England, when heavy storms would sometimes flush dead animals out of gutters and drains, making it look like they'd fallen from the sky.
3. "The dog days of summer" — refers to the hottest, most sluggish stretch of summer. It actually comes from astronomy: ancient Romans noticed the "Dog Star," Sirius, rose alongside the sun during the hottest weeks of summer, and believed the star added to the heat.
4. "Every dog has its day" — meaning everyone gets a moment of success eventually. It dates back centuries, appearing in a form referenced by Shakespeare in Hamlet, and reflects the idea that even a lowly street dog will have a triumphant moment.
5. "In the doghouse" — meaning in trouble with someone, typically a partner. It's an American phrase, popularized in the early 20th century, evoking the literal image of a dog banished outside for bad behavior.
6. "Barking up the wrong tree" — meaning pursuing a mistaken assumption. It comes directly from hunting, when dogs used to tree raccoons or other prey would sometimes bark at the wrong tree after the animal had already escaped.
7. "You can't teach an old dog new tricks" — suggesting older individuals resist change. Despite the saying, dog trainers widely agree this is actually a myth — older dogs can absolutely learn new commands, often with more focus than an easily distracted puppy.
8. "Dog-tired" — meaning utterly exhausted. It's believed to reference how hunting dogs would collapse after a long day's work, too tired to do anything but sleep.

Dog Sayings From Other Languages

9. In Mandarin Chinese, the idiom 狗急跳墙 (gǒu jí tiào qiáng, literally "a desperate dog will jump a wall") describes someone acting recklessly when cornered — similar in spirit to "a cornered animal will fight."
10. In German, "da liegt der Hund begraben" ("that's where the dog is buried") means getting to the heart of a problem — roughly equivalent to the English "that's the crux of the matter."
11. In Spanish, "atar los perros con longaniza" ("tying up dogs with sausages") describes an unrealistically extravagant or idealized situation — similar to the English "streets paved with gold."
12. In French, "il fait un temps de chien" ("it's dog weather") describes truly miserable, unpleasant weather — an evocative counterpart to the English "raining cats and dogs."