(n.) Frivolous or bantering talk\; a frivolous manner of treating any subject, whether serious or otherwise; light raillery.

aphorism apothegm backchat badinage banter bon mot boutade bright idea bright thought brilliant idea chaff conceit crack cross epigram exchange facetiae flash of wit flight of wit fooling fooling around gibe give-and-take good-natured banter happy thought harmless teasing jape jest jive joke josh kidding kidding around mot nasty crack play of wit pleasantry quip quips and cranks raillery rallying repartee retort ridicule riposte sally scintillation smart crack smart saying snappy comeback sport stroke of wit turn of thought twit wisecrack witticism