Answer:
Actually, it is an acronym:
***
SPAM
Stupid, Pointless Annoying Message (folk etymology)
http://www.acronymfinder.com/Stupid%2c-Pointless-Annoying-Message-%28folk-etymology%29-%28SPAM%29.html
<<In reference to unsolicited emails, "spam" is not an acronym, but a slang term. In reference to the food made by Hormel, it stands for "Spiced Ham".