F.U.P.A. Fucking is like tittie fucking but instead of putting your hog between a chick's sweet rack you put it between the flabby rolls of her F.U.P.A and then go to town.
CJ: "Look Dan is trying to work another fat chick."
Marvalous: "Wow he must really love to F.U.P.A. fuck cause that chick is Orca fat."