Frontal Biff Share definition Flag AKA..Fupa, Gunt...Frontal Biff is the Fat Upper area above a womans Vag. Origin: When heading down south to eat some pie, my head suddenly biffed in an immediate down slope. Hence the word "frontal biff" Frontal Biff by AC Chine December 8, 2009 0 0 Get merch Get the Frontal Biff mug. Buy Now — $32.95 See more merch