Hipster

(1) n. An over-educated, pretentious, narcissistic teenaged-to-twenty-something-year-old in skinny jeans who despises everything mainstream when in reality their lifestyles and personalities are regurgitated and inauthentic, as hipsterism has already hit the mainstream

(2) n. Assassin of cool

"Being a hipster is the opposite of a movement; it's a crawl toward death."
—Portland Mercury