Ser más corto que las mangas de un chaleco

Ser más corto que las mangas de un chaleco
 

In English?

to be daft, to be really dumb, to be dumber than dumb

To be dumber than a doorknob.
To be about as smart as a rock.
The lights are on, but no one's home.

He's ...
as sharp as a marble
two fries short of a Happy Meal
not the sharpest tool in the shed
not the sharpest/brightest crayon in the box
one bulb short of a Christmas tree
a few cans short of a six-pack

There are many more here (check out the link I provided in that thread) and here. We can help you choose our favorites. ;)

¿Corto aquí es tonto o corto de genio (shy)?

tonto

Ok. Nunca lo había escuchado así.

Gracias por llamarme tonto...:rolleyes: