Since the dawn of civilisation and likely before, animals have enriched human lives. So, it's no surprise that we call on our furry, feathered, and scaly friends when we need to make our conversation more lively. Animal idioms are so common that you likely already know and have used a few. This list presents some of the most popular ones.

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Ants in Your Pants

Meaning:
To be restless, fidgety, or unable to sit still, often due to excitement or nervousness.
When to use:
Use this when someone is moving around a lot or can't stay calm and focused.
Example:
"The kids have ants in their pants waiting for the school trip to start."

Usually, as the school year comes to a close, learners find it hard to sit still for an entire class. And if you're excited about something, you might find it difficult to sit still, too. In those times, you can say you have ants in your pants.

A group of hounds with hunters in a field.
These hounds are champs at sniffing out prey. Photo by Jason Wolf

Barking Up the Wrong Tree

Meaning:
To pursue a mistaken or misguided course of action; to make a wrong assumption about something.
When to use:
Use this when someone is blaming the wrong person or looking for a solution in the wrong place.
Example:
"If you think I took your keys, you're barking up the wrong tree. I haven't seen them."

All dogs have sensitive noses, but a particular breed of dog, the hound, outdoes them all when it comes to sniffing and tracking. Imagine a hound, hot on the trail of some criminal who climbed a tree to hide from the law. It tracks that sneaky human right to the tree he's hiding in, then starts barking to let its masters know it's found who they were looking for. But what if it's wrong?

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Barking up the wrong tree

When people come to a false conclusion, we say they're barking up the wrong tree.
"You're barking up the wrong tree, mate. I didn't take your drink from the fridge."

A Bee In Your Bonnet

Meaning:
To be obsessed with an idea or unable to stop thinking or talking about something.
When to use:
Use this when someone is fixated on a particular topic or concern, often to an excessive degree.
Example:
"She has a bee in her bonnet about organic food and brings it up in every conversation."

This idiom means being a bit angry, usually about something you think is foolish. "What's mum got a bee in her bonnet about this time?" is a perfect way to use this idiom. You can also use it to describe a friend who's irrationally angry about something. "Sally's got a bee in her bonnet again; better keep clear of her!"

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The Bee's Knees

Bees aren't always angry! This bee-related idiom means 'something perfect'.
"Why George, it's the bee's knees!" means "George, it's perfect!"

Though not exactly idioms to use in Business English, this pair of bee idioms is well-suited to the office environment. You might even use them sarcastically: "Pah! The new office hours! They're the bee's knees, don't you think?"

Let the Cat Out of the Bag

Meaning:
To accidentally reveal a secret or disclose information that was supposed to be kept hidden.
When to use:
Use this when someone unintentionally shares confidential or surprise information.
Example:
"Tom let the cat out of the bag about the surprise party by mentioning it to Sarah."

Cats have a well-deserved reputation for playing in bags. However, the origin of this idiom is much darker than the funny kitty in the clip above. It goes back to medieval times, when merchants would place a cat in a bag instead of the piglet the customer paid for.

The hungry client would walk home, excited about having a pig to raise and roast, only to discover he was cheated! But this idiom doesn't mean cheating today. It means that a secret isn't a secret anymore. "Don't let the cat out of the bag!" means "Don't reveal the secret!"

face
Cat's got your tongue?

This cat-related idiom means, "You can't answer my question?" Picture a cat grabbing your tongue with its claws, making you unable to speak. That's the image behind this idiom.

And another cat idiom: the cat's meow. Use it in the same sense as 'the bee's knees' to describe something perfect.

Chickens Come Home to Roost

Meaning:
Bad actions or decisions from the past eventually cause problems or consequences.
When to use:
Use this when someone finally faces the negative results of their earlier behaviour.
Example:
"He ignored his health for years, and now the chickens have come home to roost with his diagnosis."

Normally, chickens coming home is a good thing; it would be terrible if all your chickens flew away! But this idiom takes a dark turn. When you use it, you mean someone is facing the consequences of their actions. Usually not good outcomes, either. Surprisingly, chickens have many other idioms attached to them.

Chickening out means backing down from a challenge because you are afraid.
'Don't be a chicken' means 'don't be a coward'.
No spring chicken means old and crusty, and maybe a bit mean.
"Don't count your chickens before they hatch": don't be overconfident, or 'don't claim early success when you're not sure of outcomes'.

Crocodile Tears

Meaning:
False or insincere displays of sadness or sympathy.
When to use:
Use this when someone is pretending to be upset but doesn't really care.
Example:
"She cried crocodile tears at the meeting, but everyone knew she wasn't really sorry."

Crocodiles are easy. They try to kill and eat you.

Steve Irwin, conservationist

This late Australian conservationist and animal lover made it clear that crocodiles don't care about feelings. That gives away this idiom's meaning: crocodile tears are meaningless.

When you accuse someone of shedding crocodile tears, you're saying they're faking their feelings. Probably because they want something from you: pity, charity, or maybe even money. Beware of people shedding crocodile tears!

A herd of elephants by a watering hole on a sunny day.
These large animals don't belong in a room!

The Elephant in the Room

Meaning:
An obvious problem or controversial issue that everyone is aware of but no one wants to discuss.
When to use:
Use this when there's an uncomfortable truth that people are avoiding talking about.
Example:
"The budget cuts are the elephant in the room that we need to address."

Elephants are the biggest land animals. Rooms are typically small, designed for humans to live in comfortably. What happens when the biggest land animal occupies a space designed for humans?

That's the idea behind this animal idiom: that such a large animal must be noticed. When you want to talk about something obvious that nobody seems to want to talk about, you should say, "When are we going to talk about the elephant in the room?"

A Different Kettle of Fish

Meaning:
A completely different situation or matter; something entirely separate from what was previously discussed.
When to use:
Use this when distinguishing between two unlike situations or problems.
Example:
"I can help with your computer issues, but fixing your phone is a different kettle of fish."

Like many idioms related to animals, fish have a whole list of idioms attached to them. Have you ever used or heard of these fishy idioms?

Fishy: suspicious. Example: "There's something fishy about that deal."
Having bigger fish to fry: more important things to take care of. Don't bother me with that now, I have bigger fish to fry!"
A fine kettle of fish: a huge mess. "That's a fine kettle of fish you've landed us in!"
A fish out of water: being in an uncomfortable situation. "I felt like a fish out of water at the party; I didn't know anyone!"
Like shooting fish in a barrel: too easy. "I worried my English test would be hard but it was like shooting fish in a barrel!"

All of these, in particular, feeling like a fish out of water, also serve as English idioms about food, because who doesn't like a tasty, grilled fish?

Going Whole Hog

Meaning:
To do something completely and enthusiastically, without holding back.
When to use:
Use this when someone commits fully to something or does it to the maximum extent.
Example:
"If we're renovating the kitchen, let's go whole hog and replace everything."

People who go whole hog are totally committed to a course of action. You might say, "I don't really celebrate holidays, but for (name of holiday), I always go whole hog!" Nobody's quite sure where or when this idiom originated, but it certainly creates a funny mental image.

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Having the Lion's Share

Meaning:
To have the largest portion or the majority of something.
When to use:
Use this when one person or group gets most of something while others get less.
Example:
"The CEO gets the lion's share of the company's profits."

Lions are the kings of the beasts and, like all kings, typically have more than everyone else. That's the meaning of this animal idiom. Note that it's typically not used to describe giving someone the most; English speakers don't say, "I'll give you the lion's share if you'll leave me alone." However, you can say, "You already have the lion's share; leave me alone!"

warning
Lions are dangerous!

Two more lion-related animal idioms, 'putting your head in the lion's mouth' and 'entering the lion's den'. Both mean you're putting yourself in a risky situation.

Killing Two Birds With One Stone

Meaning:
To accomplish two goals or tasks with a single action.
When to use:
Use this when you can solve two problems or complete two things at once efficiently.
Example:
"By biking to work, I'm killing two birds with one stone—exercising and saving money on gas."

T. H. thinks to kill two birds with one stone ...

Thomas Hobbes, English political theorist

We must dismiss the terrible idea of killing birds to see the sense in this idiom. Thomas Hobbes meant it in the sense that trying to accomplish two results through one action is bound to fail. Today, it has a more positive meaning. We can, indeed, take one course of action that will deliver two desired outcomes.

Let Sleeping Dogs Lie

Meaning:
To avoid interfering with a situation or bringing up a problem that might cause trouble if disturbed.
When to use:
Use this when advising someone not to bring up old issues or conflicts that have settled down.
Example:
"I know you're still angry about the argument, but maybe we should let sleeping dogs lie."

It's such a relief to find a stopping point in a difficult situation, isn't it? That gives everyone a chance to think about things and decide whether to continue. "I was going to tell her how wrong she was but then, I just decided to let sleeping dogs lie."

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More dog idioms

In the dog house = in trouble
dog eat dog = competition is fierce

Maybe the person is your best friend and you don't want to be in the doghouse with them. Or you've realised that friendship shouldn't be a dog-eat-dog thing. In fact, we should all live in a doggy-dog world, as Gloria (Sofia Vergara) of Modern Family insists:

Raining Cats and Dogs

Meaning:
Raining very heavily.
When to use:
Use this to describe extremely heavy rainfall.
Example:
"We can't go out right now—it's raining cats and dogs!"

Like most idioms related to animals, this adorable-sounding one has several possible origins that all suggest heavy rain. During the stormy season, it's common to say, "it's raining cats and dogs out there!" It's among the most common phrases used throughout English-speaking regions. It even has a follow-up to make the visual even funnier:

It's raining cats and dogs out there! Make sure you don't step in a poodle (in a puddle).

Straight From the Horse's Mouth

Meaning:
Information that comes directly from the most reliable or original source.
When to use:
Use this when you heard something firsthand from the person directly involved or most knowledgeable.
Example:
"I heard straight from the horse's mouth that they're opening a new branch downtown."

This idiom hints that horses have some sort of wisdom that anyone can benefit from, if only they spoke 'horse'. It means getting information from the most knowledgeable source. You might ask someone, "Are you sure about that?" if what they say sounds unbelievable. This idiom would be their answer.

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Other horse related idioms

Hold your horses = 'wait', 'be patient', or 'hang on a sec!'
Dark horse: someone who's good at something when you didn't expect them to be.

You can use the first bonus idiom like so: "Now, just hold your horses! I never said that!" The second one isn't quite so common but you could help make it popular. Try it next time you want to compliment someone: "Wow, you're a real dark horse! I didn't know you could sing so well!"

Sitting Duck

Meaning:
Someone or something that is vulnerable and easy to attack or take advantage of.
When to use:
Use this when describing a person or thing in a defenceless or exposed position.
Example:
"Without proper security, the building is a sitting duck for thieves."

When you're caught in a bad situation that you have no escape from, you are a sitting duck. This idiom comes from hunters who would arrange traps to trick ducks. Once the duck swam into the trap and realised it had no way out, it just sat there until the hunter shot it.

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Another duck idiom

'Lame duck' is what you call someone with no social or political power.
A company executive might be assigned to a low-power position to force them to retire.
A politician's last years in office are called 'lame duck years' because their power is waning.

Smelling a Rat

Meaning:
To suspect that something is wrong or that someone is being dishonest.
When to use:
Use this when you sense deception or feel that a situation isn't quite right.
Example:
"When they offered such a low price, I smelled a rat and checked the contract carefully."

In English-speaking societies, rats are vile, horrible beasts. It makes sense, then, that anyone who lies, cheats, or betrays their friend would deserve the 'rat' label. You can also use this idiom when you're suspicious about something: "I smell a rat!" can also mean there's something sneaky going on.

Taking the Bull by the Horns

Meaning:
To deal with a difficult situation directly and with courage.
When to use:
Use this when someone confronts a problem head-on instead of avoiding it.
Example:
"Instead of worrying about the presentation, I decided to take the bull by the horns and practice every day."

This popular English-language idiom means 'taking charge of a situation'. It's one of the most logical idioms about animals because bulls charge (move aggressively) when they're under stress. When you have a stressful situation to deal with, you can say, "I'm going to take the bull by the horns on this." But you must follow your declaration with suitable actions.

Until the Cows Come Home

Meaning:
For a very long time, indefinitely.
When to use:
Use this to emphasise that something could continue for an extremely long period.
Example:
"You can argue about it until the cows come home, but I'm not changing my mind."

When the cows come home, it's time to get to work milking and feeding them. Until then, you have a bit of time for yourself. This idiom expresses the wish to spend a long period of time doing what you want. Usually, English speakers follow their wish up with a reason why they can't fulfil it.

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Use it in a sentence

"I could listen to [my favourite singer] till the cows come home but my boss won't let us use earbuds in the office."

When Pigs Fly

Meaning:
Never; something that will never happen.
When to use:
Use this to express that something is impossible or extremely unlikely.
Example:
"He'll clean his room when pigs fly—he never does it!"

When you're talking about something that's not likely to ever happen, this is the idiom you need. "Do you think she'll go out with you?" "Sure! When pigs fly." It's a sarcastic way of letting people know you think a situation is hopeless.

A Wild Goose Chase

Meaning:
A hopeless or pointless search or pursuit; chasing after something impossible to catch.
When to use:
Use this when someone is wasting time looking for something that doesn't exist or can't be found.
Example:
"Looking for a parking spot downtown on a Saturday is always a wild goose chase."

A wild goose chase describes a series of actions that end in frustration. Maybe you want to get your things back from a partner you broke up with, or you have to get an important document from a government office. "They sent me on a wild goose chase and I never did get the thing done!"

If you have a good imagination, this is one of the English language's funniest phrases. Picture a group of frustrated people chasing after an angry, honking goose! Or is it that the goose is chasing people, like the clip above shows?

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Sophia Birk

A vagabond traveller whose first love is the written word, I advocate for continuous learning, cycling, and the joy only a beloved pet can bring.