Frag is a commonly used term in
first-person shooter game. When you kill an opponent in
the game you call it a "frag" rather than kill. The term frag is commonly
associated with
multiplayer
deathmatch games.
The word frag was first used in the Vietnam war, but there is some
discrepancies as to the meaning of word from this time. Some references point to
it being used to describe a soldier who was brutally killed by a grenade, while
other resources state "to frag" is a term used in wartimes to describe the use
of a fragmentation grenade "to cool the ardor of any officer or NCO too eager to
make contact with the enemy".
See also deathmatch.
Also see
All About Multiplayer PC Gaming in Webopedia's "Did
You Know...?" section.