A monster made out of sludge. Lives in the sewers, and needs dark places and moisture to survive.
The Pokemon Muk is sort of like a sludge monster.
by Yui September 21, 2003
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A girl who is fat and ugly wears a gross way to short for her fat thighs dress to go to a party. SMS is used when around the actual slut.
Raquel: Did you see Brandi's dress?!
Laquisha: Ew yes what a sludge monster slut!!!!
by Michelle Bacardi July 23, 2008
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