别孩子气

act your age\ stop being such a baby\ don’t be a baby.

别做白日梦了

you think you’ll win the lottery if you keep buying tickets? get real

不是闹着玩的

my job is no laughing matter. i could get fired if i don’t do it well.

惨败（滑铁卢）

some experts think that the foreign enterprise will meet its waterloo in chinese market.

大家都知道历史上滑铁卢战役的渊源。

次品

the high technology stock he told me about was a lemon.

诺贝尔经济学家也使用这个口语表达。

从未想过

becoming a salesman never entered my mind.

得过且过（的过日子）

you need to learn to plan for your life. you can’t live for the moment any more.

顶级

our company has invited two world’s top-notch experts to guide through the project.

notch是指v型的卡槽，v代表victory，所以top-notch有“很厉害”的意思。

动身

i had better hit the road now if i want to be back home before it rains.

这个表达法一般用在有事需先走或赶早的情形。

放鸽子

john and jane were supposed to go out last night, but she stood him up.

告一段落

i just feel tired. let’s call it a day.

皇帝不急太监急

stop giving me your advice on my job. you are acting like a back-seat driver.

开过汽车的人都知道，后座back-seat的人给自己指路很不爽，若这个后座的乘客比自己对路况还熟悉，那干脆让他开车得了！back-seat driver指代那些非expert的人。

火上浇油

the situation is bad enough. don’t add fuel to the fire.

这个翻译就非常直观了。

货比三家

i shopped around to find the best deal for a new car.

绞尽脑汁

i racked my brains all the afternoon, but still couldn’t solve the math problem.

rack本意就是折磨扭曲的意思，用在这很贴切。

就好这口

i like cartoons. it’s my cup of tea.

受冷遇

the girl gave me a cold shoulder when i asked her out.

如果是要强调自己被人家冷遇了就把give换成receive就成了。

碰壁

he keeps running into a stone wall when looking for a job.

碰壁就是碰到石头墙。

人不可貌相

you can’t judge a book by its cover.

正所谓读人如读书。