bohemian

Definitions:

A person, generally affecting art of some kind, who leads a gipsy life and despises conventionality.
- Nuttall's Standard dictionary of the English language. By Nuttall, P.Austin. Published 1914. (noun) (n.) (noun)
Applied to persons of loose and irregular habits.
- The american dictionary of the english language. By Daniel Lyons. Published 1899. (noun) (n.) (noun)
BOHEMIANISM.
- The american dictionary of the english language. By Daniel Lyons. Published 1899. (noun) (n.) (noun)

Usage examples:

He speaks of 'my Bohemian years' with a certain pride, wishing one to understand that he was a wild, reckless youth, and that his present profound knowledge of the world is the result of experiences which do not fall to the lot of common men.
- The Emancipated by George Gissing
The Bohemian is an outcast.
- German Problems and Personalities by Charles Sarolea
Like all literary men, he was a Bohemian at heart.
- The First Hundred Thousand by Ian Hay