Bohemianism

noun2

1. •
   A Bohemian lifestyle.

   • It was all very well, this Bohemianism of red lamp-shades and cigarettes, but in the cold grey light that filtered through Partridge's grimy windows it did not show to any great advantage. — 1913
2. •
   A word or phrase characteristic of the Bohemian language.

   • […]Pannonianisms are in reality Bohemianisms. — 1961