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 03, 2011

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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 02, 2005

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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 08, 2007

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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

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