The Collaborative International Dictionary of English v.0.48:

Flout \Flout\, v. t. [imp. & p. p. Flouted; p. pr. & vb. n.
   Flouting.] [OD. fluyten to play the flute, to jeer, D.
   fluiten, fr. fluit, fr. French. See Flute.]
   To mock or insult; to treat with contempt.
   [1913 Webster]

         Phillida flouts me.                      --Walton.
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         Three gaudy standards flout the pale blue sky. --Byron.
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The Collaborative International Dictionary of English v.0.48:

Flout \Flout\, v. i.
   To practice mocking; to behave with contempt; to sneer; to
   fleer; -- often with at.
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         Fleer and gibe, and laugh and flout.     --Swift.
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The Collaborative International Dictionary of English v.0.48:

Flout \Flout\, n.
   A mock; an insult.
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         Who put your beauty to this flout and scorn.
                                                  --Tennyson.
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WordNet (r) 3.0 (2006):

flout
    v 1: treat with contemptuous disregard; "flout the rules" [syn:
         scoff, flout]
    2: laugh at with contempt and derision; "The crowd jeered at the
       speaker" [syn: jeer, scoff, flout, barrack, gibe]