"Frag", meaning to kill a fellow soldier, started as a short form of this term for a type of grenade
The abbreviation BFG stands for "Big Fancy Gun" as described in 
Tom Hall's ... a fragmentation grenade In deathmatch computer games, frag 
means to kill... [DOC] [TLE] Military Slang during the Vietnam War | Cherries - A Vietnam War ... [PAR] Feb 13, 2014 ... BOHICA: Acronym meaning  Bend Over Here It Comes Again ... Buy the farm: to 
be killed.