Top definition
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
Get the mug
Get a NSF mug for your father-in-law Bob.
2
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
Get the mug
Get a NSF mug for your father-in-law Bob.
3
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
Get the mug
Get a NSFS mug for your father-in-law Bob.
6
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
Get the mug
Get a NSF mug for your father-in-law Bob.
7
when something is so shitty it isn't safe for sex
Yo that was some nsfs shit dude.
by Totally_Ryan September 16, 2017
Get the mug
Get a NSFS mug for your father-in-law Bob.