Common English Idioms: 48 Essential Expressions by Topic
Idioms are fixed expressions whose meaning cannot be guessed word by word. They appear constantly in native English speech, podcasts, films, and writing. Use the search or filter by category to find what you need.
48 items · 6 topics
"break a leg"
good luck (used especially before a performance)
"You have an audition today? Break a leg!"
"bite the bullet"
endure a painful or difficult situation bravely
"I hate the dentist, but I just had to bite the bullet and go."
"cost an arm and a leg"
be very expensive
"That new laptop costs an arm and a leg."
"get cold feet"
become nervous or hesitant before doing something
"She got cold feet right before walking down the aisle."
"keep an eye on"
watch someone or something carefully
"Can you keep an eye on my bag for a moment?"
"pull someone's leg"
joke or tease someone
"I was just pulling your leg — the meeting is tomorrow, not today."
"turn a blind eye"
deliberately ignore something wrong
"The manager turned a blind eye to the safety violations."
"have butterflies in your stomach"
feel nervous or excited about something upcoming
"I always have butterflies in my stomach before a big presentation."
"think outside the box"
think creatively and unconventionally
"We need someone who can think outside the box to solve this problem."
"get the ball rolling"
start something, especially a project or process
"Let's get the ball rolling on the new marketing campaign."
"back to square one"
start again from the very beginning after a failure
"The client rejected all our designs, so we're back to square one."
"touch base"
make brief contact with someone to share information
"I'll touch base with you on Friday to check on progress."
"hit the ground running"
start a new activity energetically and effectively
"She hit the ground running on her first day and impressed everyone."
"cut corners"
do something poorly to save time or money
"Don't cut corners on safety — it will cost us far more later."
"the bottom line"
the most important point or final financial result
"The bottom line is we need to reduce costs by 15% this quarter."
"go the extra mile"
make more effort than is expected or required
"She always goes the extra mile for her clients and they notice it."
"once in a blue moon"
very rarely; almost never
"He only calls his family once in a blue moon."
"miss the boat"
miss an opportunity by acting too slowly
"If you don't apply today, you'll miss the boat — the deadline is tonight."
"in the nick of time"
just in time; at the very last possible moment
"We arrived at the airport in the nick of time and made our flight."
"burn the midnight oil"
work very late into the night
"She burned the midnight oil to finish the project before the deadline."
"kill two birds with one stone"
accomplish two things with a single action
"I'll go to the bank on my way to the gym — kill two birds with one stone."
"the ball is in your court"
it is your turn to take action or make a decision
"I've sent the proposal. The ball is in your court now."
"a blessing in disguise"
something that seems bad at first but turns out to be good
"Losing that job was a blessing in disguise — I found a much better one."
"seize the day"
make the most of the present moment; act now rather than later
"We only have one free afternoon — let's seize the day and explore the city."
"let the cat out of the bag"
accidentally reveal a secret
"Oops, I let the cat out of the bag about the surprise party."
"when pigs fly"
something that will never happen
"He'll tidy his room when pigs fly."
"hold your horses"
wait; slow down before you act
"Hold your horses — we haven't signed anything yet."
"the elephant in the room"
an obvious problem that everyone is ignoring
"The budget deficit is the elephant in the room at every board meeting."
"barking up the wrong tree"
pursuing the wrong course of action based on a wrong assumption
"If you think I took the money, you're barking up the wrong tree."
"straight from the horse's mouth"
directly from the original or most reliable source
"I heard it straight from the horse's mouth — the CEO confirmed the merger."
"a wolf in sheep's clothing"
someone dangerous who appears harmless or friendly
"That charming investor turned out to be a wolf in sheep's clothing."
"kill two birds with one stone"
accomplish two things at once with one action
"I'll drop off the parcel and visit Mum — kill two birds with one stone."
"spill the beans"
reveal secret or private information
"Who spilled the beans about the company merger?"
"take it with a grain of salt"
be sceptical about something; not take it too seriously
"Take anything he says with a grain of salt — he tends to exaggerate."
"not my cup of tea"
not something you enjoy or are interested in
"Horror movies are really not my cup of tea."
"a piece of cake"
something very easy to do
"The exam was a piece of cake — I finished in 20 minutes."
"have your cake and eat it too"
want two mutually exclusive benefits at the same time
"You can't have your cake and eat it too — choose one or the other."
"butter someone up"
flatter someone excessively to get what you want
"He spent the morning buttering up his boss before asking for a raise."
"cry over spilt milk"
be upset about something that has already happened and cannot be changed
"There's no point crying over spilt milk — just move on."
"bite off more than you can chew"
take on more responsibility than you can handle
"He bit off more than he could chew by agreeing to three projects at once."
"on cloud nine"
extremely happy; in a state of bliss
"After getting the promotion, she was on cloud nine for days."
"down in the dumps"
feeling sad, depressed, or gloomy
"He's been down in the dumps since his team lost the championship."
"at the end of your rope"
at the absolute limit of your patience or endurance
"After three sleepless nights with the baby, I was at the end of my rope."
"jump for joy"
be extremely happy about something
"When she found out she passed, she literally jumped for joy."
"under the weather"
feeling slightly ill or unwell
"I'm a bit under the weather today — probably coming down with a cold."
"go through the roof"
become extremely angry, or rise sharply (of prices or levels)
"When he saw the repair bill, he went through the roof."
"wear your heart on your sleeve"
show your emotions openly without trying to hide them
"She wears her heart on her sleeve — you always know exactly how she feels."
"get a kick out of"
find great pleasure or amusement in something
"I really get a kick out of watching stand-up comedy late at night."
Frequently Asked Questions
How many English idioms should I learn first?
Research suggests that knowing 200–300 of the most common idioms gives you coverage for the vast majority of everyday speech. Start with the 48 on this page — they are among the most frequently used across all registers of English.
What is the fastest way to learn English idioms?
The most effective method is encountering idioms in context — in podcasts, films, or native-level reading — rather than memorising lists. When you hear an idiom naturally 3–5 times, its meaning becomes intuitive. The Comprehensible Input approach accelerates this significantly.
Are English idioms formal or informal?
It depends on the idiom. Many are neutral (e.g. "go the extra mile"), some are casual (e.g. "spill the beans"), and a few are appropriate in professional writing (e.g. "the bottom line"). Always check the context in which you first encounter an idiom to judge its register.
Why is it better to learn idioms grouped by topic?
Topic-based learning activates related neural pathways, making recall much easier. When you learn "break a leg", "get cold feet", and "cost an arm and a leg" together, the body-metaphor pattern reinforces each phrase. This is far more efficient than memorising a random mixed list.
Do I need to use idioms to sound fluent in English?
Using idioms naturally signals advanced fluency, but forcing them sounds unnatural. The goal is to understand idioms when you hear them and confidently produce a handful you know well. Real fluency comes from massive exposure to authentic English, not from memorising lists in isolation.
The fastest way to internalise idioms is hearing them in real conversations. Watch authentic English videos with context.
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