25 Idioms That Make No Sense (And Their Surprising Origins)
The English language is a treasure trove of colorful expressions that paint vivid pictures with words. But what happens when you take these expressions literally? You get bizarre scenarios like cats escaping from bags, people chewing on bullets, and animals falling from the sky during rainstorms. These are idioms — phrases whose meanings can’t be understood from the literal meaning of their individual words.
Idioms are fascinating linguistic creatures that have evolved over centuries, carrying with them the cultural baggage of bygone eras. While they add richness and personality to our conversations, their literal interpretations often sound utterly ridiculous. Yet somehow, we all understand that “breaking a leg” is actually a good thing, and nobody expects you to literally spill legumes when revealing a secret.
Why Do Idioms Make No Sense? A Quick Look at Their Evolution
Idioms develop through a complex process of cultural evolution, historical events, and linguistic shortcuts. Many originated from specific trades, historical practices, or ancient customs that are no longer part of our daily lives. A phrase that made perfect sense to a 17th-century sailor or medieval knight might sound completely absurd to modern ears.
Some idioms emerged from metaphors that became so widely used they evolved into standard expressions. Others are shortened versions of longer phrases, where the original context has been lost to time. The literal absurdity of these expressions is actually part of their charm — it’s what makes English such a wonderfully unpredictable language for both native speakers and learners alike.
The persistence of these seemingly nonsensical phrases demonstrates the power of cultural transmission. Even when the original meaning or context disappears, the idiom lives on, passed down through generations like a linguistic heirloom.
The List: 25 Idioms That Make No Sense (Literally!)
1. Bite the Bullet
What it Literally Means:
To physically clamp your teeth down on a metal projectile — an action that would be both painful and pointless.
What it Actually Means:
To endure a difficult or unpleasant situation with courage and determination.
Its Surprising Origin:
This idiom comes from military field surgery in the days before anesthesia. Soldiers undergoing painful operations would literally bite down on a bullet to help them endure the pain and muffle their screams. The lead was soft enough not to break their teeth, making it a practical (if primitive) pain management technique.
2. Spill the Beans
What it Literally Means:
To accidentally knock over a container of legumes, creating a mess on the floor.
What it Actually Means:
To reveal a secret or disclose information that was supposed to remain confidential.
Its Surprising Origin:
This phrase possibly originates from ancient Greek voting practices. Citizens would vote by placing beans in containers — white beans for “yes” and black beans for “no.” If someone accidentally spilled the beans, they would prematurely reveal the results of the vote, hence “spilling” the secret.
3. Break a Leg
What it Literally Means:
To wish someone would suffer a painful bone fracture in their lower limb.
What it Actually Means:
A way to wish someone good luck, especially performers before they go on stage.
Its Surprising Origin:
The theatrical world is notoriously superstitious, and saying “good luck” is considered bad luck. “Break a leg” is thought to be a way around this superstition. Some believe it refers to bending the knee in a curtsey or bow after a successful performance, while others think it comes from “breaking” the leg line (the curtain) to take a bow.
4. Cat Got Your Tongue?
What it Literally Means:
A feline has somehow acquired and made off with your speaking organ, leaving you unable to communicate.
What it Actually Means:
A question asked when someone is unusually quiet or seems unable to speak.
Its Surprising Origin:
This disturbing phrase may originate from ancient torture methods where victims’ tongues were cut out and fed to cats. A less gruesome theory suggests it comes from the “cat o’ nine tails,” a whip used for punishment that would leave victims speechless with pain.
5. Let the Cat Out of the Bag
What it Literally Means:
To release a domestic feline from a cloth container, presumably so it can roam freely.
What it Actually Means:
To accidentally reveal a secret or surprise.
Its Surprising Origin:
In medieval markets, dishonest merchants would sell customers a pig in a bag. Sometimes, they would substitute a less valuable cat for the pig. When the buyer got home and “let the cat out of the bag,” the fraud was revealed. The truth was literally out of the bag.
6. Kick the Bucket
What it Literally Means:
To strike a water container with your foot, possibly sending it flying across the room.
What it Actually Means:
To die.
Its Surprising Origin:
This morbid idiom likely comes from slaughterhouses, where pigs were suspended from a wooden beam called a “bucket” before being killed. In their death throes, the animals would kick against this beam, literally “kicking the bucket.”
7. It’s Raining Cats and Dogs
What it Literally Means:
Household pets are falling from the sky like precipitation — a truly apocalyptic weather event.
What it Actually Means:
It’s raining very heavily.
Its Surprising Origin:
Several theories exist for this bizarre expression. In medieval times, heavy rains would wash dead animals through the streets, making it appear as if they had fallen from the sky. Another theory points to Norse mythology, where cats represented storms and dogs represented wind.
8. Under the Weather
What it Literally Means:
To be physically positioned beneath atmospheric conditions — essentially impossible unless you’re underground.
What it Actually Means:
To feel unwell or sick.
Its Surprising Origin:
This nautical idiom refers to sailors who felt seasick during rough weather. They would go below deck to escape the harsh conditions, literally positioning themselves “under” the weather that was making them ill.
9. Barking Up the Wrong Tree
What it Literally Means:
A dog is directing its barks at an incorrect species of plant.
What it Actually Means:
To pursue a mistaken course of action or to make an accusation against the wrong person.
Its Surprising Origin:
This phrase comes from hunting with dogs. Sometimes hunting dogs would chase prey up a tree, but the animal would escape to another tree while the dog continued barking at the wrong one. The hunters would realize their dogs were literally barking up the wrong tree.
10. Bite Off More Than You Can Chew
What it Literally Means:
To tear off a piece of food that’s too large to fit comfortably in your mouth.
What it Actually Means:
To attempt something that’s beyond your capabilities or to take on more responsibility than you can handle.
Its Surprising Origin:
This idiom has a straightforward origin in eating habits. Before modern food preparation, people often had to bite directly from large pieces of food. Taking too big a bite could lead to choking or discomfort — a perfect metaphor for overextending oneself.
11. Hit the Road
What it Literally Means:
To strike the paved surface with your fist or another object.
What it Actually Means:
To leave or start a journey.
Its Surprising Origin:
This phrase emerged in the early 20th century when road travel became more common. “Hitting the road” referred to the physical act of beginning a journey on roadways. The “hit” suggests the decisive action of starting to travel.
12. Cost an Arm and a Leg
What it Literally Means:
To pay for something using body parts as currency — a gruesome and impractical payment method.
What it Actually Means:
To be extremely expensive.
Its Surprising Origin:
One theory suggests this phrase comes from portrait painting. In the 18th century, portraits were priced based on how much of the subject was included. A portrait showing just the head and shoulders cost less than one including arms and legs, making the full-body portraits literally cost “an arm and a leg.”
13. Once in a Blue Moon
What it Literally Means:
During a rare astronomical event when the moon appears blue in color.
What it Actually Means:
Very rarely or almost never.
Its Surprising Origin:
A “blue moon” refers to the second full moon in a calendar month, which occurs roughly every 2.7 years. The moon doesn’t actually appear blue, but the rarity of the event made it a perfect metaphor for something that happens infrequently.
14. Pull Someone’s Leg
What it Literally Means:
To physically grab and tug on another person’s lower limb.
What it Actually Means:
To tease someone or play a harmless joke on them.
Its Surprising Origin:
This phrase has a darker possible origin than its playful meaning suggests. In 18th-century London, thieves would literally pull on people’s legs to trip them and make them easier to rob. A less sinister theory suggests it comes from the practice of pulling the legs of hanged criminals to hasten their death.
15. Speak of the Devil
What it Literally Means:
To verbally reference Satan or other demonic entities.
What it Actually Means:
Said when someone you were just talking about unexpectedly appears.
Its Surprising Origin:
This phrase comes from the longer expression “speak of the devil and he’s sure to appear,” based on an old superstition that mentioning the devil would summon him. Today, it’s used lightheartedly when someone arrives just as they’re being discussed.
16. Wear Your Heart on Your Sleeve
What it Literally Means:
To somehow attach your vital organ to your clothing and display it publicly.
What it Actually Means:
To openly show your emotions without hiding your feelings.
Its Surprising Origin:
This phrase comes from medieval jousting tournaments. Knights would wear the colors or tokens of their lady loves tied to their sleeves as a public declaration of their romantic feelings. They were literally wearing symbols of their heart’s affection on their sleeves.
17. Let Sleeping Dogs Lie
What it Literally Means:
To ensure that resting canines remain in a horizontal position.
What it Actually Means:
To avoid interfering with a situation that might cause trouble if disturbed.
Its Surprising Origin:
This straightforward idiom comes from the practical wisdom that waking a sleeping dog might result in it becoming aggressive or agitated. The metaphor extends perfectly to situations where stirring up trouble is best avoided.
18. Cry Over Spilled Milk
What it Literally Means:
To shed tears because dairy product has been accidentally knocked over.
What it Actually Means:
To be upset about something that cannot be changed or undone.
Its Surprising Origin:
This phrase reflects practical farm wisdom. Spilling milk was a genuine loss for farming families, but crying about it wouldn’t bring the milk back. The idiom teaches us not to waste emotional energy on irreversible mistakes.
19. Get Cold Feet
What it Literally Means:
To experience a drop in temperature in your lower extremities.
What it Actually Means:
To become nervous or hesitant about doing something, especially at the last moment.
Its Surprising Origin:
This phrase possibly originates from military contexts where soldiers would feign frostbite or illness in their feet to avoid battle. Another theory links it to gambling, where nervous players would experience poor circulation due to anxiety, literally getting cold feet.
20. Jump on the Bandwagon
What it Literally Means:
To physically leap onto a wagon carrying musical performers.
What it Actually Means:
To join a popular trend or support a cause because everyone else is doing it.
Its Surprising Origin:
In 19th-century American politics, candidates would travel with circus-style bandwagons to attract crowds. Politicians with growing popularity would invite supporters to literally “jump on the bandwagon” and ride with them, showing their support publicly.
21. Go the Extra Mile
What it Literally Means:
To travel an additional 5,280 feet beyond your intended destination.
What it Actually Means:
To make a special effort or do more than what’s expected.
Its Surprising Origin:
This phrase comes from the Bible, specifically Matthew 5:41: “If anyone forces you to go one mile, go with them two miles.” It referred to Roman soldiers who could legally compel civilians to carry their packs for one mile, but going a second mile was an act of grace.
22. A Dime a Dozen
What it Literally Means:
Twelve items sold for the bargain price of ten cents.
What it Actually Means:
Something very common and of little value.
Its Surprising Origin:
This American idiom originated in the 1930s when mass production made many goods extremely cheap. Items that once had value became so common they could literally be sold at twelve for ten cents, making them worthless due to their abundance.
23. Hit the Nail on the Head
What it Literally Means:
To accurately strike a small fastener with a hammer.
What it Actually Means:
To describe a situation exactly right or to get to the heart of the matter.
Its Surprising Origin:
This phrase comes directly from carpentry. Successfully hammering a nail requires hitting it precisely on the head rather than bending it by hitting the side. The accuracy required made it a perfect metaphor for precision in speech or thought.
24. Burning the Midnight Oil
What it Literally Means:
To set petroleum-based fuel on fire during the late hours of the night.
What it Actually Means:
To work late into the night, especially studying or doing detailed work.
Its Surprising Origin:
Before electric lighting, people used oil lamps for illumination. Working late required literally burning oil through the midnight hours, making this one of the more logical idioms on our list.
25. Wrap Your Head Around It
What it Literally Means:
To physically encompass something with your cranium.
What it Actually Means:
To understand or mentally grasp something complex or difficult.
Its Surprising Origin:
This modern idiom emerged in the 20th century as a metaphor for mental comprehension. The image of wrapping your head around something suggests the mental effort required to fully grasp a complex concept.
Frequently Asked Questions
Why do idioms often make no literal sense?
Idioms develop over centuries and often originate from historical practices, cultural contexts, or trades that no longer exist. What made perfect sense to someone in the 16th century might sound absurd today because we’ve lost the original context that gave the phrase meaning.
Are these nonsensical idioms unique to English?
Not at all! Every language has idioms that sound bizarre when translated literally. English just happens to have borrowed from many different languages and cultures throughout history, creating a particularly rich collection of seemingly nonsensical expressions.
Do other cultures find English idioms confusing?
Absolutely. English idioms are often cited as one of the most challenging aspects of learning English as a second language. The disconnect between literal and figurative meaning makes them difficult to understand without cultural context.
How do new idioms develop in modern times?
New idioms still emerge from popular culture, technology, and shared experiences. Phrases like “going viral” or “breaking the internet” are modern examples of how contemporary activities create new idiomatic expressions.
Why do we keep using idioms that make no literal sense?
Idioms persist because they’re culturally embedded and often more colorful than direct statements. They create a sense of shared understanding among speakers and add personality to language, even when their literal meanings are absurd.
Can the meaning of idioms change over time?
Yes, idioms can evolve. Sometimes the meaning shifts slightly, or usage changes. However, most established idioms remain remarkably stable in meaning, even as their origins are forgotten.
The English language’s collection of bizarre idioms reflects our rich cultural history and the wonderfully illogical way languages evolve. These 25 idioms that make no sense literally have survived because they capture something essential about human experience, even when they describe impossible scenarios like cats stealing tongues or pets falling from the sky. Much like List25’s fascinating explorations of language and culture, these expressions remind us that the most interesting aspects of human communication often defy logic while somehow making perfect sense.
Understanding these idioms and their origins not only improves your grasp of English but also provides insight into the historical moments and cultural practices that shaped our language. The next time someone tells you to “break a leg,” you’ll know they’re not wishing you harm — they’re carrying forward a theatrical tradition that’s survived for generations, nonsensical as it may literally sound.