When a n00b is really crap at a game and they keep getting owned they'll kill their own team mates as its the only way to score any kills. More often than not they'll eventually get kicked from the server and everyone will remember how much of a twat they are.
cloudstrife :: heh lol im killnig u cos i am teh smatr
someone :: quick cloudstrife is TKing again, someone kick him
cloudstrife :: lol
PluCh :: PluCh to the rescue !!!
cloudstrife was kicked
PluCh :: FNAR !!!
by PluCh December 15, 2004
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People on XBOX live or PS3 who go online and kill their own teammates for a good laugh. But it is highly looked down upon by those who take the game too serious.
Joe- Fuck this is the third time i've been killed by that guy, fucking teamkillers.

Steve- Dude its only a game.
by Your Biological Father July 30, 2009
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When a douche bag on your team is killing his team mates because he is such a noob, he cant kill the other team
Hey! My partner just killed me. He sucks at this game. He Keeps Teamkill(ing)
by Axel Schuck June 14, 2007
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1) Someone who demonstrates the qualities of a fucktard (See definition) before, after, or during the action of killing a teammate in an online game.

2) Caboose, from Red vs. Blue
You teamkilling fucktard! You shot your CO!
by Shadowlings Tear January 30, 2005
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Your dick busts a nut so hard (see "howitzer dick") that said nut arcs up and over the blade of your bedroom ceiling fan and lands on your shoulder (or more embarrassing places).
"Bro, I beat my dick so hard last night that it fucking teamkilled me"
by Major M. Major September 25, 2016
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