THESAURUSspeaking or behaving in a way that is not polite and is likely to offend or annoy people►rude
speaking or behaving in a way that is not polite and is likely to offend or annoy people: He’s one of the rudest people I’ve ever met. I don’t mean to be rude, but I have to get going.
►impolite
formal not polite: Chewing with your mouth open is impolite.
►insulting
saying or doing something that insults someone: He made some very insulting comments about her intelligence.
►tactless
carelessly saying or doing things that are likely to upset someone: It was tactless to ask her if she’d gained weight.
►offensive
likely to upset or offend people: His remarks are offensive to African Americans.
►obnoxious
behaving very badly and very rudely toward other people: One drunk and obnoxious customer was making rude comments about the waitresses.
►disrespectful
not showing respect for someone or something, when you should: The players should not be disrespectful to the coach.
►insolent
formal deliberately rude, especially to someone in authority: Instead of answering the question, she gave him an insolent stare.
►impertinent/impudent
formal impolite and not respectful, especially to someone who is older or more important: It was impudent of her to try to tell the teacher how to teach.
impolite and not showing respectSYN impertinent, rude: an impudent child► see thesaurus at rude—impudence noun [uncountable]