Top Definition
Abbreviation for 'no fucking kidding'
John: man that shits low
Paul: yeah nfk :|
by lee2j June 23, 2004
Nice Fitting Kitty; a tight pussy. Normally used to describe one of many of a paid companion's attributes.
Wow, dude; even after having all those kids, your Mom still has an NFK. She only charged me fifty bucks, and nearly tore me up.
by Jimmy Ducks March 20, 2014
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