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Abbreviation of Killing Floor, a co-op survival horror game for the PC.
S0M3R4ND0MKFPL4Y3R: Hey dude, wanna play some KF?

AMark336699: Hell yeah! We're gonna rack up mad dosh!
by Brison. August 26, 2012
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Dec 1 Word of the Day
"Man fuck Donald trump, he wants to build a wall and don't pay taxes!!"
by January 30, 2017
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kinda funny, used in the world of text messaging and instant messaging. everyone has found themselves at one point or another saying "lol" when you aren't really "laughing out loud", "kf" fills in the void that seperates the "histerical" from the "not funny". its for those things that are humorous but not enough to cause you to bust out laughing.
Bob: Guess what i saw today...

Sue: What?

Bob: I saw this old guy yelling at a student and fall going up the steps today, then got up and kept talkin as if nothing happened.

Sue:Thats what he get, kf
by kelanddenney18 April 24, 2007
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stands for king frier, the king of getting high
person 1: dude i got so high last night, like higher then anyone has before

person 2: you're a kf for sure
by hellooooooooooooooooooooooo October 01, 2009
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short for kickflip which is a manover in skateboarding where the board does a full flip. while u bring your front foot up you take it to the side and kick it to make it flip. the basic move that most other moves come from.
That kf backside 5050 was sick!
by KayC October 05, 2006
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