simper UK /ˈsɪmpə/US /ˈsɪmpɚ/verb 2noun 1forms 3phrases 1 verb2 •To smile in a foolish, frivolous, self-conscious, coy, obsequious, or smug manner.How the fools kotowed and simpered while I looked over their jewels and speculated upon how much I could get for them! — 1915 •(no longer used) To glimmer; to twinkle.Yet can I mark how stars above / Simper and shine. — 1633 noun1 •A foolish, frivolous, self-conscious, or affected smile; a smirk.He paused, and then a strange expression appeared on his lips. It was very like a simper. — 1972 formssimpered · simpering · simpers Phrases with simper simper outTo speak with a simper.