bon mot UK /bɒn məʊ/US /ˌbɑn ˈmoʊ/ noun1 •A clever saying, phrase, or witticism; often, a witty riposte in dialogue.But so it is: our Writer has met with a Bon Mot of this Cato’s; which, according to his shallow Understanding and silly Interpretation, he presages will ever live as a noble Free-thinking Saying. — 1725 formsbon mots · bon-mots · bons mots