a person who derives/her his identity largely through his association with a subculture which has been deemed "hip," a word taken from African American Vernacular English (AAVE)
Hipsters is a term used to describe those individuals devoted to retro fashions, independent music and film, alternative comics, and other forms of expression that are popular in hipster subculture. The term is sometimes used as a blanket descriptor for fans of indie rock music. More generally, trendsetters in fashion are sometimes called hipsters, though this use is distinct from the hipster subculture, whose fashion sensibilities are specific and not usually destined for the mainstream.
A hipster is a person who is strongly associated with a subculture that considers itself hip. The term was used originally in the early 1940s to describe aficionados of jazz, and it eventually described many members of the Beat Generation, but its usage declined in the 1960s, with the term hippies coming into wide usage.