An idiom is a collection of terms used as a common phrase whose meaning is not deductible from literal words.

The English language has plenty of phrases that are useful to learn. Idioms are words or phrases that aren’t meant to be taken literally. They usually have a cultural meaning behind them. If you can’t understand idioms, you will not be able to understand the context.

1A bird in the hand is worth two in the bushIt is used to suggest that it’s easier to hang on to what you already have than risk losing by attempting to do something better.
2A blessing in disguiseA seeming tragedy that ultimately yields positive results.
3A dime a dozenQuite normal and of no special significance.
4A little learning is a dangerous thingThis refers to the idea that a limited amount of knowledge will confuse people to believe that they are more experts than they are, leading to errors.
5A penny for your thoughtsOften used to query what they thought about.
6A penny saved is a penny earnedThis clause suggests that people be careful with their money and have savings. It decides that if money is saved, it is as good as money.
7A perfect stormAbsolutely terrible or critical, as a result of many negative and unpredictable influences.
8A picture is worth 1000 wordsAn image transmits more powerful information than words.
9A snowball effectIt is a process that begins from an initial stage of small meaning and builds on itself, becoming larger (graver, more serious), and probably also dangerous or catastrophic, even though it may be beneficial (A virtuous circle).
10Actions speak louder than wordsWhat you do is more valuable than what you speak because what you do shows your real intentions and emotions.
11Add insult to injuryAct in a manner that worsens a negative or awkward situation.
12An ounce of prevention is worth a pound of cureIt is better in the first place to control anything from happening than to fix the damage after it happened.
13Barking up the wrong treeFollow an incorrect or mistaken line of thought or course of action.
14Beat around the bushTo address a subject, but omit the key elements, sometimes purposely. To postpone or avoid speaking about something hard or unpleasant.
15Better late than neverIt is preferable to be late than never to arrive at or happen to someone or something.
16Birds of a feather flock togetherThere would be people of the same kind or with the same preferences and interests.
17Bite off more than you can chewTake on an undertaking that one cannot carry out.
18Bite the bulletDecide to do something hard or uncomfortable that you put off or hesitate to do.
19Bolt from the blueA rapid, unforeseen incident.
20Break a legA word of encouragement normally informs someone who is about to play before an audience, particularly a theater performer.
21Break the iceTo make a person who has not interacted beforehand feel comfortable.
22By the skin of your teethBy an exceedingly thin margin; barely.
23Call it a dayEnd a period of operation, especially resting content that was adequately completed.
24Comparing apples to orangesIt is often invoked when a person compares two objects that are considered so distinct that any comparison is invalid.
25Costs an arm and a legIt’s very costly.
26Cut somebody some slackYour conduct or behavior is less crucial than normal because you know they are in a hard position.
27Cutting cornersEnter anything in what appears to be the easiest, fastest, or cheapest way, particularly by not applying important measures or ignoring rules.
28Do something at the drop of a hatYou do it automatically without stopping to think about it.
29Do unto others as you would have them do unto youTreat everyone the way you’d like to be handled.
30Don’t count your chickens before they hatchDon’t count on anything that hasn’t happened. Don’t make plans based on a positive thing until it happens. Don’t plan to realize all your dreams. Don’t base your plan on future events. Don’t say all you want until you have them.  
31Don’t cry over spilled milkThere’s no point getting mad about things that have already arisen and can’t be changed.
32Don’t give up your day jobUsed as a sarcastic way to warn others not to try something they’re unlikely to succeed.
33Don’t put all your eggs in one basketThis means that one should not focus all energies and energy in one place, as one could risk everything.
34Easy does itUsed in spoken English, in particular, to encourage others to approach the job cautiously and slowly.
35Every cloud has a silver liningEvery difficult or sad situation has a soothing or more optimistic component, although this may not be immediately apparent.
36Get a taste of your own medicineSomeone should have the same negative experience they gave someone, telling them how bad it is.
37Get out of handIt isn’t easy to manage.
38Get something out of your systemGet rid of worry or anxiety.
39Get your act togetherOrganize oneself in the manner required to achieve something.
40Give someone the benefit of the doubtDecide to believe someone, even though you’re not sure what the person says is true.
41Give someone the cold shoulderIntentionally neglect or treat others unfriendly.
42Go back to the drawing boardStart preparing again because the first strategy failed.
43Go on a wild goose chaseWasting money on something that doesn’t exist. Spending time looking for something you can’t find. Silly quest for something that can’t be done. Chase something beyond your control.  
44Good things come to those who waitIf people are diligent and patient, they’ll eventually hit their target.
45Hang in thereRemain constant in tough circumstances.
46He has bigger fish to fryTo have more or more fun activities to do or attend.
47He’s a chip off the old blockAn individual who resembles a parent’s behavior.
48Hit the nail on the headFind exactly the right answer.
49Hit the sackGo to sleep.
50Ignorance is blissIf you don’t know anything, you don’t care.
51It ain’t over till the fat lady singsIt means one does not expect to know the outcome of an in-progress case.
52It takes one to know oneThe person criticizing has identical flaws to the person criticized.
53It’s a piece of cakeThings are accomplished easily.
54It’s not rocket scienceUsed to mean you don’t think something’s hard to do or understand.
55It’s raining cats and dogsIt’s raining hard.
56Kill two birds with one stoneAchieving two things at once.
57Let someone off the hookAvoid being disciplined or blamed for anything.
58Let the cat out of the bagDisclose a secret recklessly or wrongly.
59Live and learnA term used after learning from personal experience.
60Look before you leapOne should not act without first considering potential effects or hazards.
61Make a long story shortUsed to explain what happened in a few terms, without any details.
62Miss the boatToo late to grab the opportunity.
63No pain, no gainTo accomplish something, suffering is important.
64On the ballNote new concepts, approaches, and patterns.
65On thin iceIn a vulnerable position.
66Once in a blue moonIt’s rare to happen.
67Play devil’s advocateAn individual supports a contrary or unpopular opinion, often for argument.
68Pull someone’s legTo make others believe something untrue as a joke. Trick or deceive others playfully.
69Pull yourself togetherRecover control of one’s emotions.
70Put something on iceDo nothing for a time about a proposal or suggestion.
71Rain on someone’s paradeInhibit someone from celebrating an opportunity or event; spoil somebody’s plans.
72Saving for a rainy daySet aside for a potential time of need.
73Slow and steady wins the raceConsistency, while progress can be gradual, would inevitably be more effective than hurriedly or carelessly getting things done.
74So far so goodUp to now, improvement has been satisfactory.
75Speak of the devilSay when a person appears just after the reference is made.
76Spill the beansUnintentionally or accidentally disclose confidential details.
77Take a rain checkPolitically refuse a bid, meaning that it will be taken up later.
78Take it with a grain of saltConsider something exaggerated; believe only part.
79That’s the last strawLast in a list of bad things. To be the only tolerable element that can’t be embraced.  
80The ball is in your courtThe next move is up to you.
81The best of both worldsWin-win status. A condition where one may benefit from two separate or conflicting items simultaneously. A circumstance where you can enjoy two different opportunities. Two different stuff’s best qualities. Enjoy topics contrary to nature by concealing participation in one or both. To be part of things that are very different in their intrinsic existence.  
82The best thing since sliced breadUsed to describe something or anyone really nice, useful, etc.
83The devil is in the detailsIt is the most challenging part of the specifics of a matter.
84The early bird gets the wormThe first person to come is the one who succeeds.
85The elephant in the roomThere’s an apparent or complicated issue people don’t want to talk about.
86The whole nine yardsEverything, all of something.
87There are other fish in the seaThere are many other outstanding or more fitting individuals, things, opportunities, or prospects that you can find in the world. This was particularly said if anyone recently had anything or some romantic relationship that failed or proved bad.
88There’s a method to his madnessReasonable reasons, even though they may sound silly or odd for one’s acts.
89There’s no such thing as a free lunchAnything for nothing is not possible to obtain.
90Throw caution to the windYou do something without thinking about the risks involved.
91Time flies when you’re having funWhen you’re doing something, time seems quicker.
92To get bent out of shapeBecome frustrated or upset.
93To make matters worseAs a result, the poor situation gets worse.
94Under the weatherSlightly unwell or low-spirited.
95We’ll cross that bridge when we come to itA term that means you won’t think about a potential future problem, but if it happens, you’ll deal with it.
96Wrap your head around somethingUnderstanding something that is considered intimidating, frustrating, or alien.
97You can say that againExpressing emphatic agreement in spoken English.
98You can’t have your cake and eat it tooTwo attractive but mutually incompatible solutions can’t be enjoyed.
99You can’t judge a book by its coverUltimate appearances are not a reliable indicator of someone or something’s true character.
100Your guess is as good as mineTo have no idea.

English languages are an integral part of daily English. They still come in both written and spoken English. Since idioms are not always simply meaningful, you may need to familiarize yourself with each idiom’s meaning and use. That may seem like a lot of work, but learning idioms is fun, particularly when you compared idioms in your own vocabulary.

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