not all there
成語所屬單字there
not all there — 慣用語
1. slightly strange, confused, or not thinking clearly; used informally to describe
1.慣用語
釋義
腦袋不靈光；心不在焉—形容一個人精神恍惚或不太清醒
slightly strange, confused, or not thinking clearly; used informally to describe someone who seems mentally absent.
例句
Niran kept forgetting his keys and staring into space, as if he was not all there.