Synonyms and related words :
arch, arrogant, audacious, bantam, biggety, bluff, bold, brash, brassy, brazen, bumptious, challenging, cheeky, chutzpadik, cocky, combative, contemptuous, contumelious, crusty, daring, defiant, defying, derisive, disdainful, disregardful, disrespectful, facy, flip, flippant, fresh, frivolous, gally, gratuitous, greatly daring, impertinent, impudent, insolent, intrusive, light-minded, malapert, meddlesome, nervy, obtrusive, pert, procacious, regardless of consequences, rude, sassy, smart, smart-alecky, smart-ass, uncalled-for, volatile, wise, wise-ass