DuckCorp Dico

Found one definition

1.                 From The Devil's Dictionary (1881-1906):
                   
   
   
                   
                     
   LAP, n.  One of the most important organs of the female system -- an
   admirable provision of nature for the repose of infancy, but chiefly
   useful in rural festivities to support plates of cold chicken and
   heads of adult males.  The male of our species has a rudimentary lap,
   imperfectly developed and in no way contributing to the animal's
   substantial welfare.