wiseacre /ˈwaɪzeɪkə(ɹ)/noun 2verb 1forms 3 noun2 •One who feigns knowledge or cleverness; one who is wisecracking; an insolent upstart. •(no longer used) A learned or wise man.A fool's paradise is better than a wiseacre's purgatory. — 1776 verb1 •To act like a wiseacre; to wisecrack. formswiseacred · wiseacring · wiseacres