Source : Webster's Revised Unabridged Dictionary (1913)

Ungracious \Un*gra"cious\, a.
   1. Not gracious; showing no grace or kindness; being without
      good will; unfeeling. --Shak.

   2. Having no grace; graceless; wicked. [Obs.] --Shak.

   3. Not well received; offensive; unpleasing; unacceptable;
      not favored.

            Anything of grace toward the Irish rebels was as
            ungracious at Oxford as at London.    --Clarendon.
      -- {Un*gra"cious*ly}, adv. -- {Un*gra"cious*ness}, n.

Source : WordNet®

ungraciousness
     n : an offensive lack of good manners [ant: {graciousness}]