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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 March 17, 2006
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2
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 02, 2005
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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 03, 2011
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4
So, if you were saying goodbye to a friend you'd say:
See you tomorrow! Love ya NSF!
by dumbledoc May 08, 2007
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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
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6
NSF funded our grant for $329,500.00
by seanbmoredudeyeahbuddy January 09, 2009
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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.
by Agent Orange July 28, 2004
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