The Collaborative International Dictionary of English v.0.48:

Head-cheese \Head"-cheese`\ (h[e^]d"ch[=e]z`), n.
   A dish made of portions of the head, or head and feet, of
   swine, cut up fine, seasoned, and pressed into a cheeselike
   mass.
   [1913 Webster]

WordNet (r) 3.0 (2006):

headcheese
    n 1: sausage or jellied loaf made of chopped parts of the head
         meat and sometimes feet and tongue of a calf or pig