bon mot
ˌbän ˈmō/
noun
noun: bon mot; plural noun: bon mots; plural noun: bons mots
  1. a witty remark.
    synonyms: witticism, quip, pun, pleasantry, jest, joke;

    informalwisecrack, one-liner;
    rareapophthegm, equivoque
    “the dialogue is dry—it’s mostly laughless bon mots about relationships”
Origin
mid 18th century: French, literally ‘good word.’