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100 Idioms Every English Learner Should Know

February 15, 2026

100 Idioms Every English Learner Should Know

No. Term Definition
1. A blessing in disguise A good thing that seemed bad.
2. A dime a dozen Very common and cheap.
3. A piece of cake Very easy to do.
4. Add fuel to the fire Make a bad situation worse.
5. Back to square one Return to the beginning.
6. Bark up the wrong tree Blame the wrong person.
7. Beat around the bush Avoid saying it directly.
8. Bite off more than you can chew Take on too much.
9. Call it a day Stop working for now.
10. Catch someone red-handed Catch someone in the act.
11. Cost an arm and a leg Be very expensive.
12. Cut corners Do something cheaply or badly.
13. Devil is in the details Small parts can cause problems.
14. Don’t count your chickens Don’t assume success too early.
15. Drive someone up the wall Annoy someone greatly.
16. Drop the ball Make a mistake; fail.
17. Eager beaver A very enthusiastic worker.
18. Easy does it Go carefully; don’t rush.
19. Elephant in the room Obvious issue everyone ignores.
20. Every cloud has a silver lining Good can come from bad.
21. Face the music Accept consequences of actions.
22. Feel under the weather Feel slightly ill.
23. Fish out of water Uncomfortable in a new place.
24. Fit as a fiddle Very healthy and strong.
25. Get a taste of your own medicine Be treated as you treated others.
26. Get cold feet Become too scared to act.
27. Get the hang of it Learn how to do it.
28. Go the extra mile Do more than expected.
29. Hit the nail on the head Say exactly the right thing.
30. Hit the sack Go to bed.
31. Hold your horses Wait; slow down.
32. Hush-hush Kept secret; not public.
33. In a nutshell In a few words.
34. In hot water In trouble.
35. It takes two to tango Both sides share responsibility.
36. Ivory tower Life away from real problems.
37. Jump on the bandwagon Join something popular.
38. Jump the gun Start too early.
39. Jury is still out No decision yet.
40. Just the tip of the iceberg Only a small visible part.
41. Keep an eye on Watch carefully.
42. Keep your chin up Stay positive and hopeful.
43. Kick the bucket Die.
44. Kill two birds with one stone Achieve two goals at once.
45. Let the cat out of the bag Reveal a secret accidentally.
46. Like two peas in a pod Very similar to each other.
47. Long story short Briefly; skipping details.
48. Lose your touch Stop being good at something.
49. Make a long story short Tell it briefly.
50. Make ends meet Have enough money to live.
51. Miss the boat Miss a chance or opportunity.
52. Mum’s the word Keep it secret.
53. Nip it in the bud Stop it before it grows.
54. No pain, no gain Effort is needed for success.
55. Not my cup of tea Not something I like.
56. Not playing with a full deck Not very smart or sane.
57. On the ball Alert and quick to act.
58. Once in a blue moon Very rarely.
59. Out of the blue Suddenly; unexpectedly.
60. Over the moon Extremely happy.
61. Piece of the pie A share of something.
62. Pull someone’s leg Joke; tease someone.
63. Put all eggs in one basket Risk everything on one plan.
64. Put your foot in your mouth Say something embarrassing.
65. Quick on the draw Fast to react.
66. Quiet as a mouse Very quiet.
67. Quirks of fate Strange, unexpected events.
68. Quit cold turkey Stop suddenly, without easing.
69. Rain on someone’s parade Spoil someone’s joy.
70. Read between the lines Find the hidden meaning.
71. Right as rain Healthy again; fine.
72. Rome wasn’t built in a day Big things take time.
73. Speak of the devil The person appears when mentioned.
74. Spill the beans Reveal a secret.
75. Steal someone’s thunder Take credit for another’s idea.
76. Stick to your guns Don’t change your position.
77. Take it with a grain of salt Don’t fully believe it.
78. The ball is in your court It’s your turn to act.
79. The best of both worlds Two good things together.
80. Throw in the towel Give up; stop trying.
81. Under the weather Feeling ill.
82. Up in the air Not decided yet.
83. Upset the apple cart Cause trouble; ruin plans.
84. Use your noodle Think carefully.
85. Vanish into thin air Disappear completely.
86. Variety is the spice of life Differences make life interesting.
87. Vent your spleen Express anger openly.
88. Voice of reason Someone giving sensible advice.
89. Water under the bridge Past events no longer important.
90. Wear your heart on sleeve Show feelings openly.
91. When pigs fly Never; impossible.
92. Wild goose chase Useless search for something.
93. X marks the spot The exact place to find something.
94. X-ray vision Ability to see through things.
95. Xenial as can be Extremely welcoming to guests.
96. Xylophone in the attic Odd, useless thing kept.
97. Yank someone’s chain Tease or trick someone.
98. Year in, year out Every year; repeatedly.
99. Yellow-bellied Cowardly; lacking courage.
100. You can say that again I strongly agree.

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