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.

den Kopf untersuchen lassen müssen, verrückt sein

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.
Wenn du das für eine gute Idee hältst, musst du deinen Kopf untersuchen lassen.
He wants to quit his stable job to become a street performer? He really needs his head examined!
Er will seinen sicheren Job kündigen, um Straßenkünstler zu werden? Er muss wirklich seinen Kopf untersuchen lassen!