avoir un grain

to be crazy; to be nuts

→ avoir

phrase Rare #42,616

to be crazy; to be nuts Informal expression meaning that someone is eccentric or mentally unstable. Do not confuse it with avoir un grain de beauté, which means “to have a mole” or “to have a beauty mark.”

FR: Il doit avoir un grain pour penser ça !

EN: He must be crazy to think that!