Synonyms and related words :
aggressively self-confident, bluff, bold, brash, bumptious, cheeky, chesty, chutzpadik, cocky, conceited, contemptuous, crusty, derisive, disrespectful, facy, flip, flippant, forward, fresh, gally, gratuitous, immodest, impertinent, impudent, know-it-all, malapert, nervy, obtrusive, overwise, peacockish, peacocky, perk, perky, pert, procacious, puffed up, rude, sassy, saucy, self-conceited, self-opinionated, smart, smart-alecky, smart-ass, stuck-up, swelled-headed, uncalled-for, wise-ass