DuckCorp Dico

Found one definition

1.                 From The Collaborative International Dictionary of English v.0.48:
                   
   
   
                   
                     
   Cack \Cack\ (k[a^]k), v. i. [OE. cakken, fr. L. cacare; akin to
      Gr. kakka^n, and to OIr. cacc dung; cf. AS. cac.]
      To ease the body by stool; to go to stool. --Pope.
      [1913 Webster]