not the sharpest pencil in the cup
(redirected from somebody is not the sharpest pencil in the cup)not the sharpest pencil in the cup
Not intelligent; dim-witted or prone to stupidity. The new boyfriend isn't the sharpest pencil in the cup, but he's pretty good looking! I wasn't the sharpest pencil in the cup in school, but I still managed to find a profession I loved.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.