to become ill, either physically or mentally, because of pressure; to make sb laugh a lot
to become ill, either physically or mentally, because of pressure
You'll crack up if you carry on working like this.
to start laughing a lot
He walked in and everyone just cracked up.
crack sb upinformal
to make sb laugh a lot
Gill's so funny, she just cracks me up.
Definiciones del Oxford Advanced Learner's Dictionary, 9.ª edición