bohemianism

n. nonconformism, practice of living an unconventional lifestyle

The term bohemian was first used in the nineteenth century to describe the untraditional lifestyles of marginalized and impoverished artists, writers, musicians, and actors in major European cities. Bohemians were associated with unorthodox or antiestablishment political or social viewpoints, which were often expressed through extramarital sexual relations, frugality and/or "voluntary poverty".
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(n.)
The characteristic conduct or methods of a Bohemian.
  

term for the lifestyle of avantgarde artists, especially from the romantic movement - in opposition to the bourgeoisie - synonym for rootless gypsies

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