voiding knife

from The Collaborative International Dictionary of English v.0.48

Voiding \Void"ing\, n.
   1. The act of one who, or that which, voids. --Bp. Hall.
      [1913 Webster]

   2. That which is voided; that which is ejected or evacuated;
      a remnant; a fragment. [R.] --Rowe.
      [1913 Webster]

   {Voiding knife}, a knife used for gathering up fragments of
      food to put them into a voider.
      [1913 Webster]