not the sharpest pencil in the cup

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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.
See also: cup, not, pencil, sharp
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
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