nutcase

He called his neighbor a nutcase after she shouted at the mailman every morning.

用法提示：nutcase 在此作名词，指行为怪异、可能危险的人。

The movie's villain is a complete nutcase who laughs while destroying the city.

用法提示：用 nutcase 描述虚构人物，强调精神失常、危险。

Don't listen to his plan; he's a nutcase who thinks aliens live in his basement.

用法提示：nutcase 用于日常口语，表示思维不正常的人。