A way of describing someone as ignorant. Like saying one is not the brightest crayon in the box; One taco short of a Grande Meal; Not the brightest bulb in the socket; Dumber than a box of hair; etc...
What the fuck was I thinkin tellin the cop he was a fat pig AlphaDouche?? Man, I'm as sharp as marbles...
by TreDubDizzle August 3, 2009
Get the Sharp as Marbles mug.by John Joe September 20, 2012
Get the You are sharp as a wet sack of marbles mug.Person 1: He's not the sharpest tool in the shed.
Person 2: Not the sharpest? He's as sharp as a marble.
Person 2: Not the sharpest? He's as sharp as a marble.
by j99barker June 29, 2016
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