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thong underwear/bikini-bottoms in general, more specifically the thin string of fabric that goes from front to back in the butt crack
Dude, I can't believe that piece of cunt floss your bitch wore to the beach yesterday.
by Prof. Jayy July 10, 2008
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Pubic hair that is found between your teeth after oral sex with a female
Guy said "I wish she had shaved, now I have a mouth full of cuntfloss"
by mboy August 31, 2007
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