Sloppy Vampire Share definition Flag To preform an act of oral sex on a woman during her period without knowing she is menstruating. Often occurs in the dark. "Last night I got drunk and ate out some bitch's pussy and I looked like a Sloppy Vampire" Sloppy Vampire by Ethan F October 17, 2007 0 0 Get merch Get the Sloppy Vampire mug. Buy Now — $32.95 See more merch