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.
by vince_k May 7, 2014
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