Search Result for "non-u": 
Wordnet 3.0

ADJECTIVE (1)

1. not characteristic of the upper classes especially in language use;


The Collaborative International Dictionary of English v.0.48:

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]
WordNet (r) 3.0 (2006):

non-U adj 1: not characteristic of the upper classes especially in language use