Synonyms and related words :
active, activist, activistic, aggressively self-confident, alert, alive, animate, animated, arch, arrogant, audacious, bantam, biggety, bluff, bold, bouncing, bouncy, brash, brassy, brazen, breezy, bright, brisk, bubbly, bumptious, challenging, cheeky, cheerful, chesty, chipper, chirk, chirpy, chirrupy, chutzpadik, cocky, conceited, contemptuous, crusty, daring, defiant, defying, derisive, disdainful, disregardful, disrespectful, ebullient, effervescent, energetic, enthusiastic, facy, flip, flippant, forward, fresh, frisky, full of go, full of life, full of pep, gally, gay, gratuitous, greatly daring, ill-mannered, immodest, impertinent, impolite, impudent, insolent, jaunty, jolly, keen, know-it-all, live, lively, malapert, mercurial, militant, nervy, nimble, obtrusive, out of line, overwise, peacockish, peacocky, peart, peppy, perk, perky, presumptuous, puffed up, quicksilver, regardless of consequences, rude, sassy, saucy, self-conceited, self-opinionated, smacking, smart, smart-alecky, smart-ass, snappy, spanking, spirited, sprightly, spry, stuck-up, swelled-headed, uncalled-for, uncivil, unmannerly, vivacious, wise-ass, zingy