Pronounced 'En-Sas', positive acronym meaning no strings attached sex. Similar in use to ONS however usually used when it meant nothing to both parties.
trevor: so you seeing that girl now or what geezer?
tony: nah man, strictly NSAS, on the real.
trevor: seen?
tony: seen, she's safe wit that tho.
trevor: seen.
tony: nah man, strictly NSAS, on the real.
trevor: seen?
tony: seen, she's safe wit that tho.
trevor: seen.
by 2toN aka second to none July 27, 2007

by Name removed by the NSA January 03, 2014

Single successful individual with no time to spend in the bars looks for NSA relationship. - craigslist
by Anonymous July 12, 2003

U.S. shadow government agency that touts the mission to save our freedoms and way of life by destroying our freedoms and way of life.
by BrainCell August 20, 2013

No Strings Attached, but it doesn't refer to a type of relationship, but to the willingness/desire to have sex without the necessity of a relationship. NSA means lets have some fun without creating any obligations beyond the moment. We do what we do tonight and dont ever have to see each other again. But without the negative connotation of one-night stand, even if that is what it is.
by Roger M. December 28, 2005

National Security Agency; the United States cryptologic organization that coordinates and directs highly specialized activities to protect United States information systems and to produce foreign intelligence information.
by Dancing with Fire September 03, 2012

Stands for "National Stalker's Association" A group of people who is very good at finding personal information.
Guy 1: Dude, I saw this chick taking pictures of me outside my window
Guy 2: She must've been part of the NSA
Guy 2: She must've been part of the NSA
by thatgirlwithashoulderfetish October 27, 2015
