Top Definition
One with the perfect blend of geenus and muffin top, such that it has it's own Mc gravitational pull generally topped by large back tits.
Godzilla in the form of stacked fat roll's, sitting on the whole park bench, devouring deep fat fried oreo's at the fair. Sorry kid's fatty Mcass ate my last 43lbs of cookies.
by grundolph the brown February 27, 2010
2 Words related to fatty Mcass

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