Poser

Someone who acts just to keep up with a stereotype, and later instead of recognizing it, (Yes they're in denial) they tend to call others who aren't even close to a poser a 'Poser'. Pretty much, someone who believes they qualify for that certain label, but can't pull it off.

"Man, I'm Scene!" "Um, no, coon tail clip-ons and a BMTH shirt is not Scene, shut the fuck up, you Poser."