badinage (n.)

"light railery, playful banter," 1650s, from French badinage "playfulness, jesting," from badiner (v.) "to jest, joke," from badin "silly, jesting" (16c.), from Old Provençal badar "to yawn, gape," from Late Latin badare "to gape," from *bat- "to yawn" (see abash). One who indulges in it is a badineur.