Buffet party pooper

Someone who attends a birthday party at a buffet restaurant but only consumes a small salad or soup, then refuse to pay the full buffet price when the bill comes. Or only pays a small amount that he/she feels covers the cost of the food that was eaten.

Friend: Wait a minute, you still ate something, so you still need to pay the full buffet price of $25.99 per person.
Freebooter: No, i only ate a salad, which doesn't cost the $25.99 price
Friend: What???......That's not the point of this situation......so basically you're a buffet party pooper!!