Gunk or paste that grows between a guys balls and lower anus, when he does not have a bath for a week or more. Or the remnants of poop and sweat buildup.
A type of food that the big brother of some insane hick is good at making. Source : The Texas Chainsaw Massacre (old version). What is head-cheese? Use your imagination if you dare...
Cheese and egg head is when you eat lots of cheese and eggs and are on your way to becoming buff. You workout and you're on your way to becoming a meat head.