'non-U' definitions:
Definition of 'non-U'
From: WordNet
adjective
Not characteristic of the upper classes especially in language use
Definition of 'non-U'
From: GCIDE
- non-U \non-U"\ (n[o^]n*[=u]"), adj. Not characteristic of the upper classes especially in language use. [Chiefly British] [Narrower terms: {lower-class (vs. middle-class) (vs. upper-class), low-class}]
- Syn: vulgar. [WordNet 1.5]