Top Definition
1. Acronym for "Ultra Beefy Pussy Lips".

2. A beat-up, turned-out vagina that is usually accompained by a foul odor and/or taste.
You're gettin' it on with a chick that you've never been with before. You go down to drink from her natural spring of goodness only to notice that she has one of those vaginas that looks like someone reached up in there, pulled it inside out, and left it hanging. "Damn... that bitch has got U.B.P.L.'s!!!"
by Thunder80 September 22, 2010

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