have a screw loose
成語所屬單字loose
have a screw loose — 慣用語
1. To be slightly strange, foolish, or mentally unstable in a harmless way.
1.慣用語
釋義
腦袋不太正常；有點毛病
To be slightly strange, foolish, or mentally unstable in a harmless way.
例句
Anyone who runs a marathon in this heat must have a screw loose.
Quinn's friends joked that she had a screw loose for adopting six cats.