Kill Steal 

In online multiplayer games, when somebody else kills the enemy you are fighting. This often results in you earning less experience points than you normally would for killing that enemy because two people were attacking it.

Only noobs do this, and is considered a gamer's equivalent of a war crime among many.

"Dude, I was fighting a (insert enemy) and this noob came out of nowhere and stole my kill."
_ _ _

"Don't kill steal, asshole!"

Kill Steal by Big McHugeLarge January 13, 2008

kill steal 

When you playing an online game that involves killing, and right when your about to kill someone, someone jumps out and kills him first

player 1: OHHH IMA KILL YOU
player 2: NOOOO
player 3: hahahah KILL STEAL!!
player 1: WTF U HAXZOR ROFLCOPTER ROFLCAKES!!!

kill steal by Slyslutter July 20, 2006

kill-steal

Attacking a mob in a MMORPGthat has already been engaged in combat. Usually for the purpose of obtaining looting rights over another individual or group.

Often a tactic used by a griefer to annoy other players.

You tried to kill-steal Peter Lee again, but failed miserably.

That guild of griefers keeps trying to kill-steal when we spawn mercs.

kill-steal by camb November 18, 2003

Steal Kill and destroy 

a campaign to promote positive lifestyles for the youth and spread love and acceptance across the nation. myspace.com/stealkillanddestroy

Satan is going to Steal Kill and destroy you

Steal Kill and destroy by SKAD March 24, 2009

Kill Stealer

Someone in a multiplayer video game who waits for someone to weaken their enemy and kills them last second so instead of the person who did all the work getting credit the the person who stole gets it.

Person 1: WOW, that's so gay!
Person B: What happened?
Person 1: This noob just stole my kill!
Person B: I fuckin hate Kill Stealers!

Kill Stealer by Urmomther January 9, 2008

Kill stealer

Referring to any person who takes the last shot on an enemy character and only the last shot and getting the kill. can be used for any game. Quite prolific on Halo and COD.

holy shit ive been shooting this guy for ages he must be close to dieing O WHAT THE FUCK HOW DID I NOT GET THAT, YOU FUCKING KILL STEALER.

Kill stealer by Dizzylittlelord April 2, 2010

Kill stealer

A guy or group of people that will wait to you engage a enemy and when the enemies health points are low will kill the enemy with as little as 1 shot or hit and steal your kill and hard work

"DAMN! I almost killed that guy "
"That kill should have been mine"
"Fucking kill stealers HONZA!!"

Kill stealer by Kill hater June 21, 2019