smart aleck

from WordNet (r) 3.0 (2006)

smart aleck
    n 1: an upstart who makes conceited, sardonic, insolent comments
         [syn: {wise guy}, {smart aleck}, {wiseacre}, {wisenheimer},
         {weisenheimer}]

from Moby Thesaurus II by Grady Ward, 1.0

41 Moby Thesaurus words for "smart aleck":
      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