名词疯子

1. 疯子;狂人
If you refer to someone as a nutcase, you mean that they are mad or that their behaviour is very strange.

e.g. The woman's a nutcase. She needs locking up.
那个女的是个疯子，得把她关起来。

noun

1. someone deranged and possibly dangerous

Synonym: crazyloonylooneyweirdo