ser más tonto que una piedra*

* to be dumber than a stone

Spanish Spain

Expression USED Frequently BY Almost Everyone

Used when a person does something silly or behaves in a stupid way.

''¿Cómo se te han podido olvidar las llaves otra vez? ¡Eres más tonto que una piedra!''

''How could you forget your keys again? You're dumber than a stone!''

Confirmed by 4 people