crack up
US /kræk ʌp/
UK /kræk ʌp/

1.
rachar de rir, fazer rir muito
to laugh uncontrollably or to cause someone to laugh uncontrollably
:
•
The comedian's joke made everyone crack up.
A piada do comediante fez todo mundo rachar de rir.
•
I always crack up when I watch that movie.
Eu sempre racho de rir quando assisto a esse filme.
2.
surtar, ter um colapso nervoso
to suffer a mental or physical breakdown
:
•
The pressure of the job caused him to crack up.
A pressão do trabalho o fez surtar.
•
She was afraid she would crack up under the stress.
Ela tinha medo de surtar sob o estresse.