Derogatory slang for a slut puppy. A name that is awarded to floozies for their cum dumpster tendencies. Always trying to put it in the butt puppy style.
Dude, Thomas's girlfriend is such a Slu-Pup... she doesn't have an asshole, just two vaginas.
by Black-d-in-da-b Char Walt June 30, 2013
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