What is Fat Vagina?
Fat Upper Vaginal Area for females, or FFA-Full Frontal Ass in males. When someone is so fat, it looks as if they have a beachball stuffed in the front of their pants. In actuality a Fat Vagina Or Fuva is a fat belly that one tucks into their pants.
Bill - "Did you see that fat chick?"
Steve - "Yeah, with that fat vagina hanging down!"