Anyone who displays an intense interest in art of any kind, including music, design, etc. Used as a descriptive label especially when the speaker is frustrated. Not usually used in a derogatory way.

University of British Columbia, Vancouver students in the faculty of arts.

They have macbooks, non perscription glasses, scarves, shop at american apparel and listen to alternative indie music that youve never heard of.

Hip artsy folks who dress chic and such, and are into some kind of art.