1.rip off 骗人的东西

What a ripoff! The new car I bought doesn't work!

真是个骗人货！我买的新车启动不了！

2.rock the boat 找麻烦

Don't rock the boat! Things are fine just the way they are.

别找麻烦了，事情这样就够好了。

3.blow it 搞砸了，弄坏了

I blew it on that last exam.

我上次考试靠砸了。

4.in hot water 有麻烦

He is in hot water with his girlfriend recently.

近段时间他跟女友的关系有点僵。

5.put one's foot in one's mouth 祸从口出

Wally is always saying such stupid thing. He has a real talent for putting his foot in his mouth.

沃力尽说这种蠢话。他真有惹是生非的本事。