what has got into somebody?

成語所屬單字get

what has got into somebody? — 慣用語

1. This is used to say that someone has suddenly started behaving strangely.

1.慣用語
釋義

…是怎麼了?

This is used to say that someone has suddenly started behaving strangely.

例句

What's got into Alex? He never used to worry like that.

I'm sorry for laughing; I don't know what got into me.