go bananas over something

go bananas over (something)

To be very excited about something. She totally went bananas over that wedding dress, so I think it's the one she's ultimately going to pick.
See also: bananas, over

go bananas over something

INFORMAL
If you go bananas over something, you become very enthusiastic about it. Everyone went bananas over his new TV show.
See also: bananas, over, something