NSFS

"Not Safe For Straights", a tag mostly used on twitter by gay people, used during and before Pride Month, users are not allowed to post any straight content under their tweets, or the kpop stans will go after you.

It started as a mockery of "Not Safe For Ramadan", but is now widely used across twitter and is now yearly occurrences.

Yo not cool bro my name says right there (NSFS), why are you replying with men fucking pussies on my tweets?

by TheZetaSeries April 17, 2020

NSF

NO SUFFICIENT FUNDS

When your chequing account does not have enough money for the chequeholder to cash.

sorry, your cheque came back NSF.

by ik999 April 17, 2006

NSF

No Strings Fun, having sex with someone without getting into a relationship with them.

girl: i'm looking for a full-on relationship
guy: fuck that, i want NSF!

by zigzag604 October 3, 2011

NSFS

Not safe for school, like NSFW, but not safe for school instead of work.

Guys, check this site out... Careful though, its NSFS

by Anuj Saraswat June 9, 2005

NSF

Non-Sexual Friendly way.

So, if you were saying goodbye to a friend you'd say:
See you tomorrow! Love ya NSF!

by dumbledoc May 22, 2007

nsf

national science foundation

NSF funded our grant for $329,500.00

by seanbmoredudeyeahbuddy January 9, 2009

NSF

An ancient word, usually it is found in old cyrillic or aramaic texts acompanied by a simple drawing of a bovine form and/or swords. It is often used to refer to a group of people that are "more 1337 than you", or a series of deviant sexual perversions.

"You suck, we are NSF!"

"So I got some glue, ballpoint pens, and teacups together last night and NSF'ed your mom!"

by assrabbit July 14, 2004