Top Definition
An extremely corpulent person who rides next to you in a plane or bus such that their fat rolls have leaked out of their seat and are resting upon you.
Dudester A: Hey bro, how was your flight back from Chi-town?

Dudester B: Oh shit, this Stinky McChundermuddflaps was sitting next to me. There was fat EVERYWHERE!
by CtotheJ May 12, 2009
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