Synonyms and related words :
arrogant, audacious, biggety, bluff, bold, brash, brassy, brazen, bumptious, challenging, chutzpadik, cocky, contemptuous, crusty, daring, defiant, defying, derisive, disdainful, disregardful, disrespectful, facy, flip, flippant, forward, fresh, gally, gratuitous, greatly daring, impertinent, impudent, insolent, malapert, nervy, pert, regardless of consequences, rude, sassy, saucy, smart, smart-alecky, smart-ass, uncalled-for, uncivil, wise-ass,