#tttf

What does "tttf" mean?
TaTranquiloTaFavoravel, TooTiredToFunction, that_they_took_from_, ToastToTheFuture, TaTranquiloTaFavorável, TalkToTheFuture, TinyTotTakesFry, TaTranquiloTaFavoraval, ta_tranquilo_ta_favorável, ThanksToTheForce