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A woman who has a nasty butt. Usually from being anally fucked to many times. Wide butt crack, jiggling all over the damn place, so lumpy, it looks like cottage cheese.
Yo, has anyone seen Paris Hilton's ass? She is such a nasty butt girl.

My mama call women who have jiggly butts nasty butt girls.
by Taswaysha February 06, 2007
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