non u

/ˌnɑn ˈju/
adjective
  1. Not characteristic of the upper class; not socially acceptable in polite or high-class society (British informal, somewhat dated).
    • In old British novels, using the wrong fork was considered terribly non-u.
    • The character's non-u accent marked him as an outsider in the aristocratic circle.
    • Her mother thought wearing jeans to dinner was completely non-u.
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