fresh, impertinent, impudent, overbold, smart, saucy, sassy, wise
Meaning: 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!"
extraneous, immaterial, impertinent, orthogonal
Meaning: not pertinent to the matter under consideration; "an issue extraneous to the debate"; "the price was immaterial"; "mentioned several impertinent facts before finally coming to the point"
impertinent, irreverent, pert, saucy
Meaning: characterized by a lightly pert and exuberant quality; "a certain irreverent gaiety and ease of manner"
He's an impertinent meddler."
Mary was impertinent and lazy.
An impertinent thing, that card was.
"Really, Ranald, you are impertinent.
"He is impertinent, insolent, your highness.
"It's the most impertinent thing I ever heard.
I hope they are not so impertinent as to follow us.
Mary Ellen became argumentative, impertinent, and domineering.
"As much--oh, no! he muttered some impertinent remark or another."
"You mustn't think me impertinent, aunt, for I don't mean to be so at all.