smartarse

noun

derogatory, slang
  1. a clever person, esp one who parades his knowledge offensively
  2. (as modifier)smartarse guidebooks

Derived Formssmartarsed, adjective
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012