What the hell? Today is my birthday, and I only just turned 22!
I told her she might want to rephrase that (I admit I was a little annoyed, but I didn't pull the bitch card too hard), at which point she clarified: "If I've never heard of him and you listen to him, he must be of the 'older genre.'"
If she had been genuinely mean about it, I'd have reported her to her manager. As it was, she was just dumb and digging herself a deeper hole. I advised her to expand her musical tastes rather than look down on people because of age, wished her a good night, and left with my groceries. I know I shouldn't be so irritated at some highschooler thinking that anyone who's graduated is ancient, but dammit! I'm not that old!