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A poopy Vagina refers to a chick that you did in the ass(aka anal) and switched to Vagine with out cleaning your cock off first, hence giving her a poopy Vagina
So I was doing this chick in the ass and switched to Vagine... Yeah needless to say That bitch had a Poopy Vagina.
by Scott Kunkel November 10, 2007
When a woman takes a shit & then accidentally wipes upward so the poop leaves a trail into her vagina.
Girl 1: "I wiped upward instead of downward after I took a shit."

Girl 2: "Oh no, you probably have a Poopy Vagina now.."
by stinkfart38 November 02, 2013