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.
Fuck these stupid 'spy' movies, like Spy Kids, or Cody Banks. They suck dick!