"Frag", meaning to kill a fellow soldier, started as a short form of this term for a type of grenade
THE SHORT FORM: "Frag", meaning to kill a fellow 
soldier, started as a short form of this term for a type of grenade  POTLUCK: Eat it
, wear it,... [DOC] [TLE] Frag dictionary definition | frag defined - YourDictionary [PAR] Education  ESL  Grammar  Abbreviations  Biography  Books & Literature ... To 
wound or kill (a fellow soldier) by throwing a grenade or similar explosive at the 
victim: He ... Related Forms: fragger.