Same word as jaunty:

airy, animated, bold, brash, breezy, buoyant, carefree, careless, cocky, dapper, dashing, debonair, devil-may-care, devilish, easy, exhilarated, flip, flippant, forward, free, fresh, frisky, frolicsome, gamesome, gay, high-spirited, hilarious, impetuous, impish, impudent, jocos