1. (Verb) When an obese person lets another party squish two of his or her fat rolls together simulating a pair of breasts in order for said "other party" to fuck. Similar to Titty Fuck using fat rolls instead of boobs. Also called FF, Gut Fuck or Gu-Fu (Goo Foo).
Cindy was very resourceful. She proudly took on eight guys at once. Although technically only three of them actually penetrated, the other five just Fat Fucked her and called it a night.