Top definition
Someone who intentionally attacks his own players in an online game.

Teamkilling in games originated by people exploiting game servers that accepted 'friendly fire'.

More recently, celebrity gaming figures like LOLMAN have utilised impact circles of weapons so as to become profficient at teamkilling, even without 'friendly fire' enabled. In games like Unreal Tournament, this works by firing a projectile in the right place, so that the force of impact makes a teammate fly so far that he loses a frag due to fall damage. This is a 'teamkill'.
Some guy is teamkilling, he must be banned.
LOLMAN, stop teamkilling!
by GamerX March 13, 2004
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I couldn’t care less (but one must keep up appearances, right?)
Frenemy has a family tragedy. "Thoughts and prayers."
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2
<Noun> Computer gaming slang.

A person who, during an internet computer game, kills or damages their team mates intentionally in order to either help the other team (to which they may also be referred to as 'spies') or just to be a cock sucker and/or n00b.
May be abbreviated to TK'er.
CHIEF: "Master K is such a fucking TK'er."
MASTER K: "OMGWTF n00b STFU!!!11"
by Stuart Fletcher November 02, 2004
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3
The killing of one's own teammates through one of three circumstances:

a) Lack of skill and shooting them accidentally, causing either death by fire or falling

b) Deliberately as an act of malice and/or general stupidity

c) Deliberately as an education to the killee regarding their own antisocial behaviour, a punishment meted out by skilled players such as LOLMAN
Ha Ha.... LOLMAN teamkilled that spawncamping n00b
by Carrot March 14, 2004
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4
Ofter a person in an online internet game who kills their own team mates for the "lolz". In other terms they may do so because they find their team mate inadequate at gaming, in which case they will team kill nubbies.
"Why are you killing your whole team?"
"Just for the lolz."
"WOW you're such a TEAM KILLER"

Or

"I Team Kill Nubs"
"Dude we're only on easy."
"Bounce back to nub land.:
"Don'te be such a TEAM KILLER come on!"
by Juzzy April 04, 2009
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5
A person who, through accidental methods or with intent to do so, kills most or all of their team, may happen repeatedly. Abbreviated as a "TK'er"
N00b: *Grenades his whole team*
players 1-4: DUDE, STOP TK'ING!
by Shockcannon March 03, 2005
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6
A person who shoots his own team mates in Multi-Player games for the fun of making others mad.
by Q December 07, 2004
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