crack up
[phrasal verb] informal 1
crack up or crack (someone) up or crack up (someone) : to begin laughing or cause (someone) to begin laughing suddenly and in a way that is difficult to control忍俊不禁;捧腹大笑;使爆笑 -
When we saw the picture, we both cracked up.我们看到那幅图画时,都忍不住大笑起来。
-
That joke really cracks me up. [=I think that joke is very funny]那个笑话让我捧腹大笑。
2
: to become mentally ill : to lose control of your thoughts and emotions so that you cannot continue to live in a normal way精神崩溃 3
crack up or crack up (something) also crack (something) up US, informal : to damage (a vehicle) by crashing撞坏(汽车) — see also crack-up 4
◊ Something that is what/all/everything (etc.) it's cracked up to be is as good as people say it is.和别人说的一样好
◊ This phrase is usually used in negative statements.此短语通常用于否定句。