Stands for: Grenades Free Foundation
Phrase that the cast of Jersey Shore Season 2 uses, especially Mike, The Situation, Pauly D, Vinny, and Ronnie.
(G.F.F. is seen on Episode 3 "Creepin" on the BlackBoard in the backround--clearly shown when Vinny is passing out on the bean bag)
Tonight we're going to Klutch to support the G.F.F.!