NSF

NO SUFFICIENT FUNDS

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

sorry, your cheque came back NSF.

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!

NSF by zigzag604 October 3, 2011

NSF

Non-Sexual Friendly way.

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

NSF by dumbledoc May 22, 2007

nsf

national science foundation

NSF funded our grant for $329,500.00

nsf 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!"

NSF by assrabbit July 14, 2004

nsf

the cDc's Ninja Strike Force, that is, the Cult of the Dead Cow. A group of degenerate mentally disturbed but highly dangerous cyber criminals who try to deflect their own insecurities and lack of prowess augmented by their inherent drug abuse problems by causing unwanted damage on innocent peoples computers and businesses.

it is allegedly the nsf who organised the attack on ACME companies networks.

nsf by Agent Orange July 28, 2004

NSF

Nut suck and fuck. (NSF)

Come over so you can NSF.

NSF by Sajeeb Chan July 8, 2010