na-adjective, noun
vulgar; coarse; crude; boorish
Describes speech, behavior, or a person that is low-class, ill-mannered, or lacking refinement. Often used in formal or written contexts.
彼の野卑な言葉遣いに、周囲の人は眉をひそめた。
People around him frowned at his vulgar language.
その政治家の野卑な振る舞いは、多くの有権者の反感を買った。
The politician's boorish behavior offended many voters.