1 definition by kittiemudd

when a womans is so fat, that her fupa covers her vagina. therefore creating the illusion that her vagina has actually migrated to her backside, located underneath her rear end. it is usually noticable when she is wearing sweatpants
f, " good grief, that woman has absolutly no business wearing a pair of pants like that. what on earth is that cleft of fat hanging off the bottom of her butt?"

me, "that my friend is a buttgina!"
by kittiemudd November 17, 2010
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