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A variation of Shamoo. Fat person, usually female, who is so fat that it seems to defy all known laws of physics that they can stand, walk, or breath without the world collapsing in on them due to the enormous gravitational pull they create.
Fuck what a giga shamoo that bitch is! What the fuck is she doing riding that moped!? Oh wait... its not a moped that's her fuckin flaps draggin'!
by Okin, Mij and Trauts July 12, 2005
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