'non-U vulgar' definitions:

Definition of 'non-U vulgar'

From: GCIDE
  • low-class \low-class\ adj.
  • 1. Occupying the lowest socioeconomic position in a society. Contrasted with middle-class and upper-class. [Narrower terms: {propertyless, wage-earning, working-class, blue-collar}] Also See: lowborn, proletarian, propertyless.
  • Syn: lower-class (vs. upper-class). [WordNet 1.5]
  • 2. characteristic of the lower classes. [Narrower terms: non-U, vulgar] PJC]