abusive, arrogant, assuming, audacious, bellicose, bold, brash, brazen, cavalier, churlish, coarse, contempt, contemptuous, contumacious, contumelious, defiant, derisive, discourteous, disdainful, disrespectful, flippant, forward, fresh, haughty, hostile, ill-mannered, impolite, improper, impudent, insolens, insubordinate, insulting, intrusive, irreverent, malapert, offensive, pert, presumptuous, procacious, provocative, rebellious, rough, rude, saucy, scoffing, shameless, surly, unabashed, uncivil, uncouth, ungracious, unmannerly, unpolished, unrefined, vulgar
alien, beside the mark, beside the point, beside the question, disconnected, extraneous, gratuitous, immaterial, inadmissible, inapplicable, inapposite, inappropriate, inapropos, incidental, incongruous, inconsequent, independent, irrelative, malapropos, off the subject, out of place, quod nihil ad rem est, remote, separate, unallied, unapt, unconnected, unrelated, without connection
associated concepts: impertinent questioning
brazen, collateral (immaterial), contemptuous, extraneous, immaterial, inapplicable, inapposite, inappropriate, inconsequential, insolent, irrelative, irrelevant, obtrusive, offensive (offending), peripheral, presumptuous, unfit, unsuitable
Burton's Legal Thesaurus. William C. Burton. 2006
adj.Not pertinent; irrelevant.n.impertinence
The Essential Law Dictionary. — Sphinx Publishing, An imprint of Sourcebooks, Inc. Amy Hackney Blackwell. 2008.