use your head

US /juːz jʊər hɛd/
UK /juːz jʊər hɛd/
"use your head" picture
1.

utiliser sa tête, réfléchir

to think carefully and intelligently about something, especially to solve a problem

:
Come on, use your head! There must be a simpler way to do this.
Allez, utilise ta tête ! Il doit y avoir un moyen plus simple de faire ça.
If you would just use your head, you'd realize the answer is obvious.
Si seulement tu utilisais ta tête, tu réaliserais que la réponse est évidente.