The Grim Adventures of Billy and Mandy Season 1 Episode 18

The Grim Adventures of Billy and Mandy Season 1 Episode 18 Putlocker Watch Online Streaming — Billy eats too much fast food, which makes him feel sick. Grim prepares a remedy for him using his grandmother's recipe, but this medicine causes a parasite to start growing on Billy's back, which Billy names Yap-yap. Meanwhile, Billy and Yap-yap continue to eat fast food, so Mandy suggests using the antidote for the original remedy. Eventually, Yap-yap, who now looks like a smaller version of Billy, detaches from Billy (which would have technically cured Billy without needing to drink the antidote) and tries to escape the antidote. In the end, Yap-yap drinks the antidote and is destroyed.