FFag Share definition Flag An insulting term for a League of Legends player, who always forfeits the game whenever a minor inconvenience happens. FF from the word ForFeit, ag from fag Enemy: First blood (Yasuo): ff 15 (Caitlyn): Shut up FFag FFag by xTrolu October 11, 2019 0 0 Get merch Get the FFag mug. Buy Now — $32.95 See more merch