Act in crazed manner (2,7)

I believe the answer is:

go bananas

(Other definitions for go bananas that I've seen before include "Lose one's cool" , "Become wild" , "Show enthusiasm" , "Become mad or furious" , "become very angry" .)

I've seen this clue in the Sydney Morning Herald.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.