[1] : WordNet (r) 2.0

wise guy
     n : an upstart who makes conceited, sardonic, insolent comments
         syn: smart aleck, wiseacre, wisenheimer, weisenheimer
see also:
smart aleck wiseacre wisenheimer weisenheimer 

[2] : Moby Thesaurus II by Grady Ward, 1.0

25 moby thesaurus words for "wise guy":
   gothamite, boldface, brazenface, chutzpanik, hussy, malapert, minx,
   pup, puppy, saucebox, smart aleck, smart ass, smart-ass, smarty,
   smarty-pants, swaggerer, upstart, whippersnapper, wise fool,
   wise-ass, wiseacre, wisehead, wiseling, wisenheimer, witling

Guy >> G Words
Guy, definition of term: Guy
guy_pag1.html

Penny Wise >> P Words
Penny Wise, definition of term: Penny Wise
penny+wise_pag1.html

Fall Guy >> F Words
Fall Guy, definition of term: Fall Guy
fall+guy_pag1.html