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1 definition by mbrunswick

 
1.
A term which originated in the first person shooter Quake in the late 90s, though it has since fallen out of use. A llama is a player who knows all the rules of an online game but uses their knowledge to disrupt or destroy his own team at any given opportunity, usually by exploiting game mechanics. A llama purposefully shoots teammates when friendly fire is on, drives vehicles into combat alone to be destroyed so teammates can't use them for their intended purpose, spams flash grenades at inopportune times, and blows up their own base if possible.

The term is related to but predates griefer, and was reserved for players disruptive only to their own team. A llama is different from a noob in that the player is not new to the game but in fact uses their familiarity with the game to purposefully harass their own team.

Probably one of the most well-known examples of llama behavior, crouching in front of the exit to your team's respawn in TFC used to prevent teammates from leaving the respawn room but kept the door open for enemies to shoot/spam grenades through the door, leaving your team defenseless.
"This guy won't stop throwing flash bangs and stealing all the health packs. What a llama."
by mbrunswick July 09, 2013