以下是实际生活中以及电影中经常出现的实用俚语，如果同学能够在雅思[微博]口语使用这样的俚语你的语言就会更加地道，更加美丽，同时也是很精彩的亮分点。

1 Be in the air 将要发生的事情

The feeling or idea that something new is about to happen or is going to change .

Example: From the arguments going on at the meeting, it seems that a change in policy is in the air .

2 Clear the air 消除误会

To settle a dispute and restore good relations

Example: We had a meeting with the workers, and I think we've cleared the air now .

3 Cost an arm and a leg 极其昂贵

To be very expensive

Example: I love that fur coat. However, I don't think I'm going to buy it because it costs an arm and a leg .

4 A bad egg 缺乏道德的人

Somebody who has no moral principles and should be avoided

Example: You mustn't lend Tim money, he's a bad egg. You'll never see him or your money again!

5　In the Bag 稳操胜券

Said of an achievement which is secure

Example: We have the deal in the bag. The client came in this morning to sign the agreement .

6 In the balance 未知的，不可预测的

Said when the outcome of a situation is unknown or unpredictable

Example: His career as a pilot is in the balance, as his eyesight does not seem good enough .

7  Drive a hard bargain 极力讨价还价

To have the negotiating strength and skills to get the most advantageous price and conditions

Example: Amanda is negotiating the best price from the suppliers. She drives a hard bargain .

8　Ring a bell 看上去或听起来非常熟悉

To look, sound or seem familiar

Example: That face rings a bell, where have I seen him before?

9　Tighten one’s belt 节衣缩食

To cut down on spending because there is less income than before

Example: Now you are out of work, you'll have to tighten your belt and give up buying new clothes and going out so often .

10　Kill two birds with one stone 一石二鸟

To complete two tasks together, with less effort than doing them separately

Example: Since I'd gone to the store to buy some bread, I thought of killing two birds with one stone and invited Mr. Biggs to the party .

11　Be in a black mood 情绪极差

To be so negative about everything that it is impossible for anyone to reason with him/her

Example: My father has been in a black mood for days, we dare not say anything to him .

12　New blood 新成员

New people brought into an organization to introduce different and original ideas

Example: It was decided to bring new blood into the school by employing teachers with the latest training .

13　Feeling blue 感到无精打采

Feeling sad or depressed

Example: She's feeling blue, because the man she loves is far away .

14　Get to the bottom of something 弄清真相

To find out the truth about something

Example: I'm trying to get to the bottom of why David left without saying goodbye .

15 A piece of cake 轻松的事

Something which is very easy to do

Example: Here…let me put the batteries in for you. It's a piece of cake .

16　Pay a call 拜访

To visit somebody

Example: As we're in this neighborhood, we might as well pay the Jacksons a call, we haven't seen them for ages .

17　By chance 偶然，意外的

Unexpectedly; with no prior planning

Example: By chance, I bumped into my wife in the shopping mall

18　Round the clock 夜以继日的

To do something continuously, without a break or pause

Example: The ambulance services worked round the clock hauling people trapped in the building to safety .

19　Keep one's cool 保持冷静

To stay calm in a difficult situation

Example: If the traffic is jamed, the only thing to do is keep your cool, or get out of the car and walk!

20 In a tight corner 处于困境

In an extremely difficult situation

Example: Whenever I get into a tight corner, I try to rely on quick thinking to get out of it .