Stands for: I'm Fucked Foundation
A phrase used by Pauly D from the "Jersey Shore Season 2" in regards to Ronnie who hooked up with grenades and proceeded to sleep in Sammie's bed.
Shit man, I'm in the I.F.F. I just cheated on my girlfriend.
I'm Fucked Foundation Used on Jersey Shore
Yetta: Oh man last night ugh, I.F.F.
Sheffield: Oh okay...... Whore.