Sardonic

sardonic
    adj 1: disdainfully or ironically humorous; scornful and
           mocking; "his rebellion is the bitter, sardonic laughter
           of all great satirists"- Frank Schoenberner; "a wry
           pleasure to be...reminded of all that one is missing"-
           Irwin Edman
    

Sardonic \Sar*don"ic\, a. [F. sardonique, L. sardonius, Gr. ?,
   ?, perhaps fr. ? to grin like a dog, or from a certain plant
   of Sardinia, Gr. ?, which was said to screw up the face of
   the eater.]
   Forced; unnatural; insincere; hence, derisive, mocking,
   malignant, or bitterly sarcastic; -- applied only to a laugh,
   smile, or some facial semblance of gayety.
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         Where strained, sardonic smiles are glozing still,
         And grief is forced to laugh against her will. --Sir H.
                                                  Wotton.
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         The scornful, ferocious, sardonic grin of a bloody
         ruffian.                                 --Burke.
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   {Sardonic grin} or {Sardonic laugh}, an old medical term for
      a spasmodic affection of the muscles of the face, giving
      it an appearance of laughter.
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Sardonic \Sar*don"ic\, a.
   Of, pertaining to, or resembling, a kind of linen made at
   Colchis.
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18 Moby Thesaurus words for "sardonic":
      Rabelaisian, caustic, contemptuous, corrosive, cynical, derisive,
      derisory, disdainful, dry, ironic, ironical, jeering, mocking,
      sarcastic, satiric, saturnine, sneering, wry