When you and your boys try to fuck the biggest, ugliest girl at the party or venue. Whoever decides to take down the beast earns the critically acclaimed beast master belt. It is similar to the UFC OR WWF belt in appearance but relates to heavyweights in the nature of plumpers.
All of us wanted to fuck but there was one fat girl that needed to be taken care of. Cody Smith decided to take one for the team and slayed the beast that night. He earned the beast master belt and is currently the belt holder and plump dumpster champion.