A piece of
meat that is difficult to
eat, or is eaten reluctantly at the end of a meal. (Similar to a boss at the end of a
game level.)
I just ate
beef and
carrot stew, and at the
bottom of my bowl was one last huge piece of boss meat.
At Joe's restaurant, I ate the appetizer, salad, mashed potatoes, rice, and drank my whole soda, and nothing was left except for a boss meat.