A command used in several online games to "kick", or disconnect an obnoxious, noob, or just disliked user/player from a server/room.
Also used to disconnect a player when the game host/master prefers to have a smaller game, or things there are too many users/players in the server/room.
Knight11292: omg, look at this noob
LarJarsE: yeah, but he's on your team!!!11
Knight11292: cmon'... /kick! plz!
Knight11292: mother fucker!
*noob english player joins a latin server*
Dragon224: tu es haces? si? jaja. /kick
Dragon224: que? jaja!
*Billydick888 has been kicked from the room*