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
-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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