1 definition by TheOtherWong

Top Definition
an ass that is extremely big, yet it is so sloppy because it has wrinkles or flaps of grease everywhere - Just like a Big Mac.
Guy 1: Yoo I got some ghetto booty last night! She got that big ass son.
Guy 2: Aww hell, that ain't no good ass, that's a big mac ass.
by TheOtherWong February 08, 2010

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