Kill Stealing Fuck. Someone who either kill steal's habitually or kill steal's something that is worth a large amount of XP.
(Guy2 smashes into the dungeon you have been fighting though for hours and kills the boss)
Guy1: "Guy2 is such a ksf!"
Guy1: "Guy2 is such a ksf!"
by awesome gamr February 24, 2010
Get the ksfmug. by faenface October 6, 2008
Get the KSFmug. by levi (ksf) (real) January 3, 2022
Get the levi (ksf) supremacymug.