noun

a socially unconventional person, especially one who is involved in the arts.

Warhol and the artists and bohemians he worked with in the 1960s

nonconformist,unconventional person,beatnik,hippy,avant-gardist,free spirit,dropout,artistic person,freak

adjective

socially unconventional in an artistic way.

as an opera singer you live a bohemian lifestyle

unconventional,nonconformist,unorthodox,avant-garde,offbeat,off-centre,irregular,original,alternative,experimental,artistic,idiosyncratic,eccentric,arty,arty-farty,way-out,off the wall,oddball