Teamkilling 

The act of killing players on the same team in a game which allows friendly fire. Teamkilling can be intentional or accidental. If it is done intentionally, it's usually out of frustration, boredom, revenge, or to get something that person has.

It is also a form of griefing, and is looked down upon by those who play the game normally.

OMG WTF HOW COME U KEEP TEAMKILLING ME OMG WTF!!!!!!!!1!1!!!11eleven vote him out!!!!1 this D00d is a gay hax0r!

Teamkilling by Rezel August 22, 2008

teamkilling 

What I spend 95% of my time doing on Call of Duty 4.

Best team killing class in COD4:
RPG
Sonic Boom
Martyrdom

This assholes teamkilling. Everybody file a complaint and get him kicked off xbox live.

teamkilling by Evil Monkey 03 March 17, 2009

teamkilling fucktard 

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!

teamkilling fucktard by Shadowlings Tear January 29, 2005

Team-Killing Fucktard 

A Team-Killing Fucktard is commonly encountered in online team-based games, such as Halo (where the term originted).

Normally they are Noobs or Newbs, or just Fucktards in general.

Team-Killing Fucktard can be abbreviated to TKFT. Plural version of the noun is TKFTs. It can also be used as an adjective to describe someone who has killed a team member. There are two definitions of such team-killers,
True Team-Killing Fucktards (TTKFT) and Enraged Team-Killing Fucktards, also known as RageQuit TKFTs (RTKFT or RQTKFT)

Origin:
The origin of the Team-Killing Fucktard originated from popular Halo webseries, Red Vs Blue (RVB) it can also be said that the first recognized TKFT is Caboose from the series, for killing team-captain Church with a tank in the first season. Caboose may not be the first TKFT, but the famous incident has sparked awareness of the dangers that TKFTs present to the online-gaming community and beyond.

You shot Church, you Team-Killing Fucktard!

Team-Killing Fucktard by Super-Ultimate-Ownage-Penguin September 11, 2011

team killing fucktard 

One who kills (either accidentally or purposefully) a member of his or her own team. Someone who should be killed themself. often used after a lasertag game with friends, during a counterstrike or halo game, or any of the other FPS or gun-related team games.

Damnit, you team killing fucktard, Watch where you're shooting!

You fucking killed me, Team Killing Fucktard!

team killing fucktard by Aadon Gondahlvor February 10, 2004

team killing fucktard 

Somebody who kills a member of his halo team out of boredom or accidentalities

You shot church you team killing fucktard!

team killing fucktard by Yaren September 30, 2004

team killing fucktard 

when u kill ur cohorts, team mate, or distraction. AKA, caboose from Red vs. blue

Tucker: You killed Church you team killing fucktard!!!

team killing fucktard by gunslingergirlvy_c_e September 2, 2005