Kid One- Likes Pop, tells friends he likes hardcore when he doesn't, goes to shows and doesn't like the music, dresses what he thinks he should = Poser
Teen Two- Likes Rap & Likes Screamo, goes to rap and screamo shows and concerts, is honest with his friends he likes both kinds of music= Scene Jumper
Teen Three- Likes Rap Only, Dresses "scene", goes to rap shows = Loyal to rap music, not a poser not a scene jumper
This is also commonly associated with being a poser, as in not being a true part of a scene or lifestyle.
See scene whore and poser.
He's is such a poser. He used to dress "punk" and didn't even like the music, and now he listens to hip hop. What a scene jumper.