A fork of Rural Dictionary
I combination of fucking and fluffing.
Would you please stop fuffing around and get back to work
to blow on hot food in order to cool it down.
can you fuff on this for me, baby? he was fuffing on her tomato soup because it was too hot.
Stands for "Fuck you, fatty!" based on an Internet discussion wherein a self-righteous workoutaholic pseudonutritionist was passive-aggressively tisk-tisking about a perfectly healthy-sized (i.e., not anorexic) woman eating a cookie. Commenters who saw right through the kidding/not kidding dubbed her attitude "FUF". The rest is history.
I am not going to put up with this nonsense because FUF, that's why!