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When a guy has sex with you while you're on the rag and when he's done your thighs look like they have the imprint of a bloody butterfly on them.
"Dude, I was on the rag last night and I fucked Johnnie and when he pulled out the insides of my thighs looked like a bloody butterfly, I call it the blooderfly."
by Demetreia July 09, 2009
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When a girl on the rag does it and when shes done it leaves a shape of a bloody butterfly on her thighs
Guy: WOW! that was great

Girl: yeah it was

Guy: oh hey theres a blooderfly on your thighs howd that get there


Guy: r u on the rag or something

Girl: SHUT UP!!!!!!!!!!!!!!!!!!!!!
by ClassyToilet August 23, 2018
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