Cervelle (en. Brain)

/sɛʁ.vɛl/

Slang Meanings

To be smart.
He always has solutions; he's really a guy with brains.
Il a toujours des solutions, c'est vraiment un mec avec de la cervelle.
Stupidity or lack of common sense.
He lost all his brains doing that.
Il a perdu toute sa cervelle en faisant ça.