Usage in a sentence: Damn, we really got goin' at it and her shit turned into a beaverslide.
by ClassActIllini March 4, 2011
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Noun

1. A term used to describe shitty, brown skid marks in your underwear. The brown streaks resemble the areas in the mud where beavers slide into the water.
"A beaverslide in your underwear is never a pleasant feeling."
by billebllunt May 13, 2014
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