poor sport; someone who ruins the enjoyment of a game
Adam: We just beat you guys.
Bob: You deflated your team's footballs and paid off the refs. We only played to collect a paycheck, knowing we would lose.
Adam: Even though you're right, I revel in your despair, and am glad you were forced to play a predetermined game. I have ruined the sport of football forever for you.
Bob: You are a gamecock.
When you have a beer gut but you still go to the gym and work to build up the rest of your body without worrying about cardio. usually rocked by guys who used to be athletic and in shape but now swill countless coors lights and eat pizza.