The line comes from the Spam sketch in Monty Python's Flying Circus, first broadcast by the BBC in 1970. In the sketch a cafe menu lists Spam in nearly every dish and a group of Vikings repeatedly sings its name, overwhelming any conversation. The sketch became so widely quoted that its name was later adopted for unwanted bulk messages online, because they similarly flood and drown out wanted content. The short rejection line remains popular as a reaction to anything repetitive and unavoidable.