Source : Webster's Revised Unabridged Dictionary (1913)

Choke pear \Choke" pear`\
   1. A kind of pear that has a rough, astringent taste, and is
      swallowed with difficulty, or which contracts the mucous
      membrane of the mouth.

   2. A sarcasm by which one is put to silence; anything that
      can not be answered. [Low] --S. Richardson.