lose one's cool

失去冷静、火冒三丈

Man, he totally lost his cool!

天哪，他可真是火大了！

lose it

火冒三丈

When his classmates started chanting "Loser Loser", he finally lost it.

当他同学开始一遍遍高呼“没用的家伙，没用的家伙！”的时候，他终于发飙了。

go ballistic

发疯

go bananas

发疯

go bonkers

发疯

go nuts

发疯

go postal

发疯

go off the deep end

失控、发疯

To be honest with you, your wife scares me.

老实说，你妻子有点恐怖。

One minute she is all happy and chirpy and the next minuie she goes off the deep end.

前一分钟还兴高采烈、谈笑风生来着，后一分钟就突然抓狂了。

I never know what might set her off.

我根本不知道什么会导致她发作。

Just because you can't get online doesn't mean you should go off the dee pend and smash your computer.

上不了网并不意味着你就可以不管三七二十一，把电脑砸个稀巴烂！