go bananas 发疯、变得非常兴奋、激动、疯狂或失去理智。这个短语通常用来形容人在某种情境下变得极度兴奋或疯狂。

【例句】
I'll go bananas if you ask me that question one more time.
如果你再问我一次那个问题，我会发疯的。

When I told her we were going to Disneyland, she got so excited that she started togo bananas.
当我告诉她我们要去迪士尼乐园时，她兴奋得简直要疯了，简直兴奋到极致了。