Top definition
An ugly piece of crap, or someone worthless to yours or anyone else's life, and they smell and look like piece of moist moldy dump
Tony Francin, just leave, everyone hates you plus you are a Mold Sack
by Primetime#1 June 05, 2010
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2
One of the greatest call of duty players in the world
"moldsack joined the game?" "Oh shit dude back out now"
by moldsack November 21, 2011
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