NFF 

No fingering February

"are you participating in NFF"
NOR"

NFF by wackgirl69 November 7, 2018

NFF 

It’s no finger February for girls since there’s a no nut november

Girl like it’s NFF like what are you doing omg

NFF by Karma for NNN December 4, 2019

NFF 

"New Found Friend"

When you go away on holiday or college trip, and one of your friends spends his time ignoring you to speak to other people and trying to be popular.

"Towle's NFF'ing it again"

NFF by Barnaby Burman December 7, 2004

NFF 

NFF is a nice way of saying Not Fucking Funny

You and Bozo are NFF

She's pregnant, it's NFF

NFF by epmb September 3, 2006

NFF 

Not Family Friendly" -- email subject warning code for "Don't look at this in front of the kids -- and use judgement about your significant other

Subject: web comic link -- 2 funny, NFF

NFF by gonxo August 6, 2010

NFF 

No Fault Found

Technical support term meaning all is well, the end user is to blame.

See also PEBKAC

NFF, EU hasnt got a scooby-doo.

NFF by hoolio February 8, 2005

NFF 

Nff stands for (Not Funny Fucker)

If some one is making a lame joke. You tell him NFF (not funny fucker)

NFF by Aos-PyroMaster December 21, 2007