When a company of any kind makes an advertisement for their competition, in such a way that would cause negative responses.
1. Husband "Oh, hey hun. Just dropped Jake off at daycare."
Wife:"Go get him quick! I just saw on TV that Roman Polanski works there!"
"Oh, calm down, that's just negative advertising."
2. TV Announcer: "Thinking about going to the Stageville Concert Hall this weekend? Well good! Cause Coldplay's gonna be there!"
Man on Couch:"Fuck that shit, I'm going to the place downtown."
Women on Couch: "No, silly. It's negative advertising, it's just cause they know that Coldplay is a sucky motherfucker of a band that deserves to choke on their own cocks for force-feeding us all their whiny bull-crap."