Synonyms and related words :
Narcissus, blowhard, boaster, boldface, braggadocio, braggart, brazenface, chutzpanik, egocentric, egoist, egotist, exhibitionist, gasbag, grandstander, hot-air artist, hussy, individualist, know-it-all, malapert, minx, narcissist, narcist, no modest violet, pup, puppy, saucebox, show-off, smart-ass, smarty, smarty-pants, swaggerer, swellhead, upstart, whippersnapper, windbag, wise guy, wise-ass, wiseacre, wisecracker, wisehead, wisenheimer