to be used jokingly to some one to refer to them as a poser
GUY2: "man, you are so hot topic-core"
Guy 2: "I hear ya. There are too many to keep up with. I believe there's a general term for that music: 'hot topic-core'. Works perfectly to describe all bands who play that stuff if you ask me and any other sane person."
Guy 1: "I can not find any logical inconsistencies in your argument, good sir."