Source : Webster's Revised Unabridged Dictionary (1913)

Jeer \Jeer\, n. [Cf. {Gear}.] (Naut.)
   (a) A gear; a tackle.
   (b) pl. An assemblage or combination of tackles, for hoisting
       or lowering the lower yards of a ship.

   {Jeer capstan} (Naut.), an extra capstan usually placed
      between the foremast and mainmast.

Jeer \Jeer\, v. i. [imp. & p. p. {Jeered}; p. pr. & vb. n.
   {Jeering}.] [Perh. a corrup. of cheer to salute with cheers,
   taken in an ironical sense; or more prob. fr. D. gekscheren
   to jeer, lit., to shear the fool; gek a fool (see 1st {Geck})
   + scheren to shear. See {Shear}, v.]
   To utter sarcastic or scoffing reflections; to speak with
   mockery or derision; to use taunting language; to scoff; as,
   to jeer at a speaker.

         But when he saw her toy and gibe and jeer. --Spenser.

   Syn: To sneer; scoff; flout; gibe; mock.

Jeer \Jeer\, v. t.
   To treat with scoffs or derision; to address with jeers; to
   taunt; to flout; to mock at.

         And if we can not jeer them, we jeer ourselves. --B.
                                                  Jonson.

Jeer \Jeer\, n.
   A railing remark or reflection; a scoff; a taunt; a biting
   jest; a flout; a jibe; mockery.

         Midas, exposed to all their jeers, Had lost his art,
         and kept his ears.                       --Swift.

Source : WordNet®

jeer
     n : showing your contempt by derision [syn: {jeering}, {mockery},
          {scoff}, {scoffing}]
     v : laugh at with contempt and derision; "The crowd jeered at
         the speaker" [syn: {scoff}, {flout}, {barrack}, {gibe}]