chatterer

from WordNet (r) 3.0 (2006)

chatterer
    n 1: an obnoxious and foolish and loquacious talker [syn:
         {chatterer}, {babbler}, {prater}, {chatterbox}, {magpie},
         {spouter}]
    2: passerine bird of New World tropics [syn: {cotinga},
       {chatterer}]

from The Collaborative International Dictionary of English v.0.48

Chatterer \Chat"ter*er\, n.
   1. A prater; an idle talker.
      [1913 Webster]

   2. (Zool.) A bird of the family {Ampelid[ae]} -- so called
      from its monotonous note. The {Bohemion chatterer}
      ({Ampelis garrulus}) inhabits the arctic regions of both
      continents. In America the {cedar bird} is a more common
      species. See {Bohemian chatterer}, and {Cedar bird}.
      [1913 Webster]