out of one's mind
01
正気でない, 非常識
(of a person) extremely unreasonable, or mentally ill
慣用句
くだけた
例
He must be out of his mind to quit such a stable job.
そんな安定した仕事を辞めるなんて、彼は正気ではないに違いない。
02
used to refer to someone who is so stressed, angry, or confused that they are unable to behave normally or make any logical decisions
例
The constant stress drove him out of his mind.
