Source : Webster's Revised Unabridged Dictionary (1913)

Swish \Swish\, v. t. [From the sound. Cf. {Swash}.]
   1. To flourish, so as to make the sound swish. --Coleridge.

   2. To flog; to lash. [Slang] --Thackeray.

Swish \Swish\, v. i.
   To dash; to swash.

Swish \Swish\, n.
   1. A sound of quick movement, as of something whirled through
      the air. [Colloq.]

   2. (Naut.) Light driven spray. [Eng.]

Source : WordNet®

swish
     adj : elegant and fashionable; "classy clothes"; "a classy dame";
           "a posh restaurant"; "a swish pastry shop on the Rue du
           Bac"- Julia Child [syn: {classy}, {posh}]

swish
     n : a brushing or rustling sound
     v : move with or cause to move with a whistling or hissing
         sound; "The bubbles swoshed around in the glass"; "The
         curtain swooshed open" [syn: {lap}, {swosh}, {swoosh}]