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1 definition by Tom Bosly

 
1.
F.K. is a short form for fat kid. It is said so the fat kid you are talking about does not know you are saying fat kid so it will not offend him/her.
Haha Mike look at the F.K.
I'm laughing so hard I can't breathe because I see the F.K.
by Tom Bosly June 17, 2006