killstealer 

One who interrupts a fight and delivers the final blow on a target that someone else has been wearing down, taking all the credit. Primarily used in multiplayer videogames, especially the Super Smash Bros. series from which it was born.

"Hey, he was mine, you killstealer!"

killstealer by Zaenos August 10, 2006

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

Killstreaker 

A girl who purposely aims low and flirts with males in a lower league (especially with simps or white knights) in hopes of adding to their body count to impress a male who is in a higher league.

Lydia is such a Killstreaker. She is only hanging out with James to impress Johnathan.

Killstreaker by simpdeystroyer December 21, 2019

Killsteal 

Noun, when you're about to kill an enemy in an online game, and another player comes out of nowhere and kills them instead, in one or two shots, usually a n00b.

Shit dude, I was about to kill Matt-O when this douche jumped up nd got a headshot!! Killsteal.

Killsteal by Matt-0 June 17, 2009

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

Killstreaker FTW 

A small youtuber who wants to make everyone laugh, has goals to reach on YouTube. Awesome person to collab with.

Killstreaker Ftw is an awesome youtuber

Killstreaker FTW by Bishpanda October 30, 2016