Cách sử dụng
The expression "kiss somebody's arse" is used when someone wants to express their dislike or frustration for a person who is trying to gain favor or advantage by excessively flattering or ingratiating themselves. It means that someone is purposely being overly nice to another person in order to make them happy or win their favor, even if they don't really mean it. The expression is considered impolite and should only be used in informal situations with close friends or family members, and not in professional or formal settings.