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

See also:

not the sharpest tool in the shed
not the sharpest knife in the drawer
not the brightest crayon in the box
not the sharpest tool in the box
be not the brightest crayon in the box
crayon
not the brightest candle
smurfbrain
airbrain
airhead

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