A genrefluid person is someone who fluctuates between more than one preferred music genre, or between having a preferred genre and not having one. They do not stick to one preferred genre, or lack thereof, for their entire life.
Person 1: What kind of music do you like?
Person 2: Recently, I've been listening to pop, reggae and metal. I'm pretty genrefluid, to be honest.
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)