Kryptonite for hipsters. Any previously obscure artistic entity that goes on to achieve mainstream acceptance, thereby rendering it irrelevant to hipsters, could be referred to as hyptonite.
James used to thoroughly enjoy Death Cab for Cutie, but he now claims that he never really cared for them. James must have been exposed to some serious hyptonite.
Fogey/fogy /fougi/ sl. (early 18C+, orig. Scot) old-fashioned, stuck-in-the mud.
Person with old fashioned ideas which he is unwilling to change: Come to the disco and stop being such an old fogey!
You think me an old fogeyand an old tory, his thoughtful voice said. I saw three generations since O’Connel’s time. I remember the famine. Do you know that the orange lodges agitated for repeal of the union twenty years before O’Connel did or before the prelates of your communion denounced him as a demagogue? You fenians forget some things. (James Joyce, Ulysses. Penguin Books,1992. p. 38)