Meaning of the word "crack up" in English

What does "crack up" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

crack up

US /kræk ʌp/
UK /kræk ʌp/
"crack up" picture

Phrasal Verb

1.

to laugh uncontrollably or to cause someone to laugh uncontrollably

Example:
The comedian's joke made everyone crack up.
I always crack up when I watch that movie.
2.

to suffer a mental or physical breakdown

Example:
The pressure of the job caused him to crack up.
She was afraid she would crack up under the stress.
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