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Short for:
1. Not Safe For Fucking
2. Not Sufficient Funds for Fucking
1. That bitch is NSFF
2. Mr Dick had NSFF so he settled for a BJ
NSFF by Mr. U-be-U January 10, 2009
Related Words
NSFF NSFFB NSFFGB
Not. So. Fresh. Feeling
(It's 90F + 85% humidity outside somewhere located in Philly/NYC/South/etc...)

"Yo(!) Jumpee... Have you ever gotten that NSFF stuff, you know... "Not-So-Fresh-Feeling," after walking 5 blocks? My drawls are SOAKED (again)!

Closely related to "swamp-ass/nuts/vag/pits..." Folks that don't wash their ARSE after dancing/walking/jogging a lot! Gym-Rats, DDR-fanboys, serfs, and the rest of you non-hygienic, dirty sheep!

WASH YOUR ARSES!
NSFF by Bosc0-[B] May 25, 2011
. When someone thinks something was/is funny, but it really wasn't.

Not So Fucking Funny
I'd laugh out loud but it's Not So Fucking Funny (NSFF)
NSFF by Mrs K February 6, 2025
When someone thinks something is so funny when it's really not
That was NOT SO FUCKING FUNNY.

Getting kicked was NOT SO FUCKING FUNNY.
(NSFF NOT SO FUCKING FUNNY).
NSFF by Mrs K February 7, 2025
Not Safe For FormerGolfer's Bed. Used to denote seemingly appropriate material that would not be safe for redraidersports.com's subscriber FormerGolfer's wife to see in bed.
Example- OT: Women in Burqas (NSFFGB)
NSFFGB by SAmatador July 7, 2010
Not Safe For Face Book

Usually Posted in a status reply when something posted on Face Book is better suited to be explained in person to avoid ridicule or worse.
1) Joe Schmo- work sucked

Jane doe- really what happened

Joe Schmo- NSFFB. call me.

2) Joe Schmoe -I just got fired from work and dumped by my girlfriend all for getting tagged in a picture. I guess when you smoke weed with a naked girl make sure there are no cameras around, thanx Jim. Some pics are NSFFB.
NSFFB by InfinitWizdumb March 9, 2010