NASA - representing "Nice And Safe Attitude"
Used as a salutation, or farewell –an interjection
Popularised by a clothing brand worn by some in the late 1990's UK rave
At first glance, the garment would appear to be an official National Aeronautics and Space Administration or NASA product, as the logo used the worm font used by NASA. However beneath the main NASA text body, it would state "Nice And Safe Attitude".
Interestingly many of those that wore this product line did not have a nice and safe attitude at all. They were in fact drug addled party kids that had taken too many class A drugs, and as a result had become paranoid, violent or simply talked a load of bollocks
at such a high speed they spat in your face as they attempted to purge their body of words.
As a result the greeting is used in a rather tongue in cheek fashion today.