smartass adjective 1noun 2verb 1forms 3 adjective1 •(disapproving, vulgar) Related to or characteristic of a smartass; irritatingly clever or smug.I have had quite enough of your smartass remarks. noun2 •(vulgar, offensive) An insolent person, especially one who makes snide remarks.Lots of luck, smartass. •(vulgar) Synonym of know-it-all, an obnoxious clever person or a person making obnoxious efforts to seem clever by acting or behaving as if they know everything. verb1 •(disapproving, vulgar) To speak in a condescending manner characterized by frequent sarcastic or disparaging remarks.I smartassed and smack-talked half of the interview, but as I relaxed a bit more and genuinely talked with them, a strange thing happened. — 2012 formssmartassed · smartassing · smartasses