non-U

[ non-yoo ]
/ nɒnˈyu /

adjective

not characteristic of or appropriate to the upper class, especially of Great Britain: certain words and phrases that are considered absolutely non-U.

Origin of non-U

non- + U (adj.)

British Dictionary definitions for non-u

non-U
/ (nɒnˈjuː) /

adjective British informal

(esp of language) not characteristic of or used by the upper class Compare U 1