Big Billy is a zombified gorilla that appears in the episode, Reedickyoulus. He has brown fur and wears a small red hat that covers a piece of his exposed brain. He seems to be decomposed, as his foot is pure bone and chunks of his flesh are missing. He was bought by Meatwad in 2002 after he was tired of his hamsters dying quickly. Eventually, Shake shoved him in a microwave, ultimately killing him. Billy is able to communicate by using sign language.