“Monkey didn't have his banana today?”直接理解，意思是“猴子今天没吃香蕉吗？”，引申意思就是指我们经常调侃说的，“你吃错药了吗？”

【例句】
Hey, dude, what’s wrong?Monkey didn’t have his banana today?
喂， 怎么搞的? 你今天吃错药了吗?

Monkey didn’t have his banana today？Got so upset!
你今天吃错药了吗?发那么大的脾气！