Slop-nopoly is a (fictional) board game that Pig plays with Angry Old Raisin during a sleepover. The goal of the game is the roll eleven dice in the cup, shake them, gargle them in the mouth, and spit them out. However, Angry Old Raisin's dentures pop out of his mouth and he wins "Slop-nopoly". So he finally pulls the victory cord and gets "slopped".
It is a parody of the popular board game Monopoly.