need (to have) your head examined

US /niːd tə hæv jʊər hɛd ɪɡˈzæmɪnd/
UK /niːd tə hæv jʊər hɛd ɪɡˈzæmɪnd/
"need (to have) your head examined" picture
1.

頭を診てもらう必要がある, 正気ではない

used to say that someone is acting in a very foolish or crazy way

:
If you think that's a good idea, you need your head examined.
それが良い考えだと思うなら、頭を診てもらう必要がある
He wants to quit his stable job to become a street performer? He really needs his head examined!
安定した仕事を辞めてストリートパフォーマーになりたいだって?彼は本当に頭を診てもらう必要がある