go crazy
idiomDefinition of go crazy
1
: to become mentally ill : to go insane
She went crazy and started to think everyone was trying to kill her.
—usually used in an exaggerated way I must be going crazy. I can't find my car keys anywhere.
2
: to act in a way that is out of control : to act wildly
We were just talking when he suddenly went crazy and started screaming and breaking things. The crowd went crazy when the team won the championship.