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1.
NSA
No Strings Attached
Single successful individual with no time to spend in the bars looks for NSA relationship. - craigslist
by Anonymous July 12, 2003
 
2.
NSA
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.
ISO of partner for mutual good time NSA.
by Roger M. December 20, 2005
 
3.
NSA
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.
The NSA headquarters is in Maryland outside Washington, D.C.; the "crystal palace."
 
4.
NSA
Created in 1952 by Truman and his cabinet, the NSA was, and still is one of the most if not the most secretive agency in our country. In 1982 (or so) its cover was blown by a book called The Puzzle Palace, finally a glimpse inside the workings inside the nations most elusive security workings. Great read, pick it up sometime.
NSA - No Such Agency
by jp+jj December 10, 2004
 
5.
NSA
A shared abbreviation that can mean one of many things (the most common): No Strings Attached & National Security Agency.

No Strings Attached is a common English Adverb / expression that refers to no other obligations or responsibilities in a deal. The abrev. NSA has become connected to the casual sex terminology as someone wishing to engage in sexual activities while being free of all responsibilities associated with a romantic relationship.

Many people believe the National Security Agency operates much like the CIA, however, the NSA is a division of the US Defense Department and specializes on the protection of all US Government Communication & Information Systems. The NSA is limited to information surveillance (national and international only) and does not engage in human intelligence activities.

Other such abbreviations: National Shipping Authority, National Standards Association, National Student Association, National Scrabble Association, Niagara Soccer Association, National Scrabble Association, etc. etc.
"25/f/Vancouver NSA looking for a good time" - Craigslist
by mylifeuncut July 10, 2008
 
6.
NSA
Allegedly the most powerful of all security agencies in the United States. That's probably why you don't here of it as much. The NSA's existence was at one point denied, just like Area 51's. But we all know that it exists. The NSA is the least discussed agency in popular culture. (In other words, movies and video games rarely touch upon the NSA. The 'spies' always work the CIA or FBI.
Sam Fisher works for the NSA

Fuck these stupid 'spy' movies, like Spy Kids, or Cody Banks. They suck dick!
by halo55555@hotmail.com July 02, 2005
 
7.
NSA
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 19, 2013