roast beef butterfly 

An external Labia (Pussy Lips), when pulled out when legs are spread it looks like a butterfly made out of roast beef!

That chick has a roast beef butterfly!

roast beef butterfly by 1974Jimmy. November 21, 2006

roast beef butterfly 

extra skin around labia that sticks out like wings from the actual pussy hole...resembles shaved roast beef like you would find on a sandwich from Arby's

she was hot, but her vagina had roast beef butterfly

roast beef butterfly by braindead cant bowl October 21, 2008