Synonyms and related words :
biggety, bluff, boldface, brash, brazenface, cheeky, chutzpadik, chutzpanik, cocky, contemptuous, crusty, derisive, disrespectful, facy, flip, flippant, fresh, gally, gratuitous, hussy, impertinent, impudent, malapert, minx, nervy, pert, pup, puppy, rude, sassy, saucebox, saucy, smart, smart aleck, smart-alecky, smart-ass, smarty, smarty-pants, swaggerer, uncalled-for, upstart, whippersnapper, wise guy