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When you eat a girl out while she is bleeding profusely out of her vagina, as a part of the menstrul cycle. When this is performed, you get a butterfly shape around your mouth drawn with the blood of her unborn children.
Mmmm nice bloody butterfly my friend!
by AnderesTheHun November 13, 2003
The wing shaped blood splatters on the inside of your thighs left after boning a chick on the rag!
Ya dude I got a bloody butterfly last night!

Sick man!

no it was pretty sweet,Imade her clean it up!
by cleist September 03, 2008