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2.
MFK
abbreviation for Mother-Fucking-Killer
Holy shit that crazy columbian MFK just threw that white boy into a brick wall!
by Nilknarf Den January 01, 2006
 
1.
MFK
The socially-acceptable acronym for a game teenagers play called Marry-Fuck-Kill. When given a choice of three names, the players must decide who they would prefer to marry, fuck or kill.
Player A: For this round of MFK, we'll go with Cameron Diaz, Angelina Jolie, Lindsey Lohan

Player B: I'll marry Cameron because she's funny, fuck Angelina because she'd be crazy in bed, and kill Lindsey because she sucks at life.

Player C: Kill Angelina because she's crazy. Marry Lindsey because she's going to make lots of money. Fuck Cameron because she's hot.
by Mr. F.izzle June 13, 2008
 
3.
mFK
MIDGET FRENCH KID - A small kid originating from france, who likes to make bagels with his penis.
WHO CHARLIE YOUR A FUCKIN MFK YOU DUMB LITTLE BAGEL MAKING PaSTRY LICKER!
by blaque? April 26, 2005
 
4.
MFK
A Mother Fuckin' Kink. Used to describe someone kinky for days.
Damn, shes an MFK! What a kink!
by Snakeballashitrebel December 06, 2009