Source : Webster's Revised Unabridged Dictionary (1913)

Laughingstock \Laugh"ing*stock`\, n.
   An object of ridicule; a butt of sport. --Shak.

         When he talked, he talked nonsense, and made himself
         the laughingstock of his hearers.        --Macaulay.

Source : WordNet®

laughingstock
     n : a victim of ridicule or pranks [syn: {butt}, {goat}, {stooge}]