The fat that hangs out of a girl's vagina. The disadvantage to vag fat is when you pump in and out, it slaps you in the nuts. Other than that, it makes sex more enjoyable.
person 1: Dude I can't wait to bang her
person 2: I wouldn't bang that! She's got vag-fat
person 1: Ew. dude, screw that I'm gonna go bang your siter instead.
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.