Define S.t.f.u Meaning

S.T.F.U.
An abbreviated form of:

Shut The Fuck Up

Often used in the popular internet comic "Little Gamers" and on internet message board and chat rooms across the nation.

The Sims is teh suxorz.
S.T.F.U!!!!11
By Bryna
S.T.F.U.

The stupid bitch wouldn't STFU so I back handed her one.
By Darlene
S.T.F.U

DUDE, S.T.F.U BEFORE I SHOT YOUR DUMB ASS!
By Marilyn