How the Word “Spam” Came to Mean “Junk Message”
While some have suggested that this was because SPAM (as in the Hormel meat product) is sometimes satirized as “fake meat”, thus spam messages are “fake messages”, this potential origin, while plausible enough on the surface, turns out to be not correct at all.
The real origin of the term comes from a 1970 Monty Python’s Flying Circus skit. In this skit, all the restaurant’s menu items devolve into SPAM. When the waitress repeats the word SPAM, a group of Vikings in the corner sing “SPAM, SPAM, SPAM, SPAM, SPAM, SPAM, SPAM, SPAM, lovely SPAM! Wonderful SPAM!”, drowning out other conversation, until they are finally told to shut it.