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Keen for skeef - A psychological disease that a person gets with symptoms such as thinking about sex all the time and wanting to have sex all the time.
"I'm so KFS bro, I could do her right now."
by anthlanty May 13, 2009
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Sep 8 Word of the Day
A casual invitation / threat used by an individual that is not afraid of fucking someone up.
PAUL: I'm going to beat your ass.

JACK: Fuck around and find out, fool!
by NX STARCHILD October 16, 2020
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2
-Kevin Fitzgerald Syndrome
-Someone who follows you around while simultaneously repeating themselves over and over
-He Didnt take his KFS pills this morning
-KFS-Extra Crispy
by e-Trock February 27, 2005
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