Haw·haw, v. i.  To laugh boisterously. [Colloq. U. S.]
     We haw-haw'd, I tell you, for more than half an hour.   --Major Jack Downing.
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  haw-haw
       n 1: a loud laugh that sounds like a horse neighing [syn: hee-haw,
             horselaugh, ha-ha]
       2: a ditch with one side being a retaining wall; used to divide
          lands without defacing the landscape [syn: sunk fence, ha-ha]