The Collaborative International Dictionary of English v.0.48:

Badinage \Ba`di`nage"\, n. [F., fr. badiner to joke, OF. to
   trifle, be silly, fr. badin silly.]
   Playful raillery; banter. "He . . . indulged himself only in
   an elegant badinage." --Warburton.
   [1913 Webster]

WordNet (r) 3.0 (2006):

badinage
    n 1: frivolous banter

Moby Thesaurus II by Grady Ward, 1.0:

26 Moby Thesaurus words for "badinage":
   backchat, banter, chaff, chaffing, exchange, fooling,
   fooling around, give-and-take, good-natured banter,
   harmless teasing, jape, jest, jive, joke, josh, joshing, kidding,
   kidding around, persiflage, pleasantry, raillery, rallying,
   repartee, ridicule, sport, twit