Source : Webster's Revised Unabridged Dictionary (1913)

Mannered \Man"nered\, a.
   1. Having a certain way, esp. a polite way, of carrying and
      conducting one's self.

            Give her princely training, that she may be Mannered
            as she is born.                       --Shak.

   2. Affected with mannerism; marked by excess of some
      characteristic peculiarity.

            His style is in some degree mannered and confined.
                                                  --Hazlitt.

Source : WordNet®

mannered
     adj : having unnatural mannerisms; "brief, mannered and unlifelike
           idiom"