Idioms and Phrases is a very important part of English language. It’s not only used in written or formal use, but also in day to day conversations. So to understand any conversations and instructions its really important to know some randomly used Idioms and Phrases.

Its also important for different job exam, during study, for work with foreign peoples. So some important Idioms and Phrases are listed below:

1. A Castle in the air – A day dream (অসম্ভব কল্পনা)
2. A Dead letter – useless document
3. A fair crack of the whip – a period of importance.
4. A fish out of water – uncomfortable situation.
5. A green horn – An inexperience person.
6. A mammoth task – A difficult/big task.
7. A man of discretion – A personality with rational power.
8. A sitting duck – An easy target.
9. A square peg in a round hole – Unsuitable.
10. A stitch in times saves nine – Timely action.
11. An Utopian scheme – an unreal plan.
12. ABC – Primary knowledge.
13. Achilles’ heel –  Small fault but can cause a person’s fall.
14. All Greek – Totally unintelligible.
15. All in – Tired.
16. Angel of laugh – cheerful.
17. Angel of Death – Dangerous, fearful.
18. Apple of discord – matter of dispute.
19. Apple of sodom – good for nothing.
20. At a loss – at one’s wit’s end.
21. At a low ebb – declining.
22. At arm’s length – short distance.
23. At bay – in a tight corner.
24. At draggers Drawn – on the points of fighting.
25. At stake – in denger.
26. Bad blood – ill feeling, animosity.
27. Bag and baggage – with all possessions.
28. Bear out – carry through.
29. Beat the clock – finish the task timely.
30. Beggars description – beyond description.
31. Behind close doors – secretly.
32. Between the lines – Hidden meaning.
33. Bid Fair – show signs of prosperity.
34. Big guns – important peoples.
35. Bill of Fare – A list of dishes at the restaurant.
36. Birds eye view – Overall picture.
37. Bite the dust – Fall to the ground.
38. Black and blue – discolored.
39. Black Sheep – wicked man.
40. Blue blood – aristocratic birth.
41. Blue chips – Industrial shares considered to be a safe investment.
42. Bolt from the blue – Unexpected danger.
43. Bottom Line- The essential point.
44. Break the Ice – break the silence.
45. Bring about – to cause.
46. Bring to book – Take to task.
47. Bring to light – make open, published.
48. Bring to pass – cause to happen.
49. Bull Market – rising.
50. Burning Question – Important issue.
51. By and By – Soon.
52. By and large – Everywhere.
53. By fits and starts- irregularly.
54. By hook and crook – By any means.
55. By Leaps and Bounds – Very rapidly.
56. Call in Question – doubt.
57. Call to mind – remember.
58. Capital punishment – Death Penalty.
59. Carry into effect – make into reality.
60. Carry the Day – win , be victorious.
61. Cat’s Paw – A person used by another as a tool.
62. Closed Fisted man – Miser.
63. Cock and Bull story – absurd story.
64. Come to a head – reach the difficult stage.
65. Come to an End – End.
66. Come to light – be Available , to publish.
67. Come to terms – to reach an agreement.
68. Crocodile tears – false sympathy.
69. Cry in the wilderness – Unheard appeal.
70. Crying needs – Very important.
71. Culpable homicide – Murder.
72. Cut and Dry – already decided.
73. Dark horse – Unknown person.
74. Dead against – strongly opponent.
75. Dead Language – A Language which is no longer in use.
76. Dead letter – Law that is not in force.
77. Deep water – in trouble.
78. Die in harness – die under the pressure of tasks.
79. Dilly Dally – to waste time frivolously.
80. Dog days – Hot weather.
81. Double game – Double edged policy.
82. Down to earth – realistic
83. Draw the line – to set a limit.
84. Drown to earth – Thrown to the ground.
85. End in Smoke – fail.
86. Ended in fiasco – complete failure.
87. Every now and then – often.
88. Fair and square – honest.
89. fall flat – become failure.
90. Far and near – All around.
91. Few and far between – rarely.
92. Fight shy – avoid.
93. Flesh and Blood – Human body.
94. Fool’s Paradise – a state of being happy for foolish.
95. For good – Forever/permanently.
96. Forty winks – short sleep.
97. French leave – Leave without permission.
98. From cradle to grave – From birth to death.
99. Full fledged – Full.
100. Gala day – A day of festivity.
101. Get along – to be friendly with one.
102. Get rid of – to get free.
103. Go through – read lightly.
104. Half a chance – An opportunity.
105. Hard and fast – Fixed.
106. Head in the cloud – Having Day dream.
107. Heart and Soul – sincerely.
108. Herculean Task – very Difficult task.
109. Hit the roof – be angry.
110. Hue and cry – Noise.
111. Hush money – Bribe.
112. In a fix – Difficult situation.
113. In a nutshell – briefly.
114. In addition to – additionally.
115. In Black and white – in Writing.
116. In case of – if.
117. In cold blood – Calmly and calculative.
118. In lieu of – Instead of.
119. In Order that – So that.
120. In the face of – Against.
121. In the nick of time – at the right time.
122. Irony of fate – by bad luck.
123. Keep body and soul together – to keep alive hardly.
124. kith and kin – relatives.
125. Lame excuse – bad plea.
126. Landslide victory – very substantial win.
127. Lay waste – Destroy.
128. Leave no stone unturned – Try all means.
129. Let loose –  lettings go.
130. Lion’s share – Major portion.
131. Live from hand to mouth – Live in poor circumstance.
132. Look down upon – to hate.
133. Look forward – waiting for something.
134. Loom large – important role.
135. Loophole – Flaws.
136. Maiden speech – First speech.
137. Make up one’s mind – decide something by someone.
138. Man of letters – learned man.
139. Man of straw – a Worth less man.
140. Milk and water – lifeless.
141. Nip in the bud – spoil in the beginning.
142. Null and void – cancelled.
143. Of no avail – in vain.
144. Of the first water – of the high value.
145. Off and on – occasionally.
146. On principle – According to principle.
147. On the eve of – Just before.
148. Once in a blue moon – very rarely.
149. Out and Out – completely.
150. Part and parcel – An integral part.
151. Pass away – to die.
152. Pass the buck- to pass the blame to someone else.
153. Past master – Expert.
154. Pick holes in – find faults with.
155. Plough sands – Do useless work.
156. Point blank – Directly.
157. Pros and cons – Advantages and disadvantages.
158. Put heads together – to discuss to solve my problems.
159. Put up with – to tolerate.
160. Raise one’s eyebrow – to cause surprise.
161. Riding for a fall – to act recklessly.
162. Right and left – indiscriminately.
163. Run into debt – borrow something.
164. Run riot – behave in a lawless way.
165. Run short – to finish.
166. Salt of life – valuable things.
167. Scape goat – Blame to others.
168. Silver lining – hope.
169. Sit on the fence – remain neutral in a dispute.
170. Six of one and half dozen of another – negligible difference.
171. Smell a rat – doubt.
172. Snake in the grass – A secret foe.
173. Soft soap – flattery for self motives.
174. Sorry figure – Poor result.
175. Spare no pains – leave no stone unturned.
176. Stone’s throw – within very short distance.
177. Swan song – last work.
178. Take a fancy to – like.
179. Take into account – to consider.
180. The three R’s – elementary education.
181. Through and through – Completely.
182. Through Thick and thin – Under all conditions.
183. Through cold water – Discourage.
184. To do away with – to get rid of.
185. To end in smoke – to come to nothing.
186. To get along with – to adjust.
187. To kick the bucket – Die.
188. To meet the trouble half way – to be puzzled.
189. To put cart before the horse – to reverse the natural order.
190. To raise One’s eye brow – Show surprise or disapproval.
191. To smell a rat – to suspect that something is wrong.
192. Tooth and nail – strongly.
193.  Turn over a new leaf – open a new chapter.
194. Up and Doing – active and lively.
195. Up to the mark – standard.
196. Ups and Downs – good and bad.
197. vexed question – difficult problems.
198. Weal and Woe – happiness and sorrow.
199. Wear and Tear – Damage.
200. Well off – Solvent.
201. Well to do – rich.
202. White Elephant – A very rare and costly possession.
203. Worth One’s while – Profitable.