Meaning

noun a member of a people with dark skin and hair who speak Romany and who traditionally live by seasonal work and fortunetelling; they are believed to have originated in northern India but now are living

noun a native or inhabitant of Bohemia in the Czech Republic

noun a nonconformist writer or artist who lives an unconventional life

originFrom Bohemia + -ian. In sense of Romani and by association, marginalized artists, from French bohémien (“person from Bohemia, Romani”), from Bohême (“Bohemia”). Regarding the sense evolution, compare gypsy.

Etymology from Wiktionary, CC BY-SA 3.0