Từ điển tiếng Anh - Cambridge Advanced Learners Dictionary
non-U
non-U UK [ˌnɒnˈjuː] US [ˌnɑːn-] UK old-fashioned adjective Behaviour or ways of speaking which are non-U would not be considered acceptable by people of high social class. Compare U Thesaurus+: ↑Manners and levels of formality↑Polite and respectful