go crazy

US /ɡoʊ ˈkreɪ.zi/
UK /ɡoʊ ˈkreɪ.zi/
"go crazy" picture
1.

to become very excited or enthusiastic about something

:
The crowd will go crazy when their favorite band comes on stage.
My kids always go crazy for ice cream.
2.

to become mentally ill or insane

:
After weeks of isolation, he started to go crazy.
The constant noise made her feel like she was going crazy.