Definition of "frag" []

• A fragmentation grenade. (noun)
• To wound or kill (a fellow soldier) by throwing a grenade or similar explosive at the victim: "He got fragged. Blown away” ( Bobbie Ann Mason). (verb-transitive)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "There are minor mutinies ( "What are they going to do, cut off our hair and send us to Vietnam?"), an undercurrent of racial tension fed by the black-power politics of H. Rap Brown and Huey Newton, and resentments that provoke plots to "frag" (i.e., kill) their superiors."
• "Scrolling through gadgets such as frag grenades and camera grenades, though, needs some tightening."
• "I've been told that this is the origin of the video-gaming slang term "frag" for an in-game kill -- it was originally Vietnam-era military slang for killing your officer to keep him from getting the rest of you killed, from "fragmentation grenade", a popular means of doing so."