Somebody who frags someone. To frag means to kill a superior officer by throwing a fragmentation grenade - a tactic used to eliminate warmongers who put lower-ranking soldiers' lives at risk by seeking confrontations, a tactic widely used in Vietnam.
Verb form of Frag, which was derived from the Vientam War Era wounding caused by FRAGmentation weaponry (bullets, grenades, and mortar shells included), and is used to denote a kill of an enemy in FPS(First Person Shooter)games.