1a) noun. a slang term for a fragmentation hand grenade.
2a) verb. "accidently" killing an officer who is incapable of leading troops by dropping a grenade on him.
2b) verb. slang used to describe the act of eliminating an opponent with a fragmentation grenade.
3) verb. slang used by computer game players to describe the act of defeating another player.
1) toss a frag in the fox hole
2a) I heard Lt. Spears was fragged by his own men
2b) Frag them!
3) I fragged JohnnyBGood11 with a rocket