Impertinent

adjective
characterized by a lightly pert and exuberant quality
“a certain irreverent gaiety and ease of manner”
Similar: irreverent, pert, saucy
adjective
not pertinent to the matter under consideration
“an issue extraneous to the debate”
Similar: extraneous, immaterial, orthogonal
adjective
improperly forward or bold
“don't be fresh with me”
Similar: fresh, impudent, overbold, smart, saucy, sassy