( informal )
1.
to become ill, either physically or mentally, because of pressure :
You'll crack up if you carry on working like this.
2.
to start laughing a lot :
He walked in and everyone just cracked up.
( informal )
1.
to become ill, either physically or mentally, because of pressure :
You'll crack up if you carry on working like this.
2.
to start laughing a lot :
He walked in and everyone just cracked up.
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005