improperly forward or bold "don't be fresh with me"; "impertinent of a child to lecture a grownup"; "an impudent boy given to insulting strangers"; "Don't get wise with me!" freshimpertinentimpudentoverboldsmartsaucysassywise
characterized by a lightly pert and exuberant quality "a certain irreverent gaiety and ease of manner" impertinentirreverentpertsaucy