Listen to the sound clip All: Boo! from The Simpsons - Season 21: All: Boo! All: Boo! This sound is from The Simpsons - Season 21 "The Simpsons" is a renowned American animated sitcom that has been captivating audiences worldwide since its debut in 1989. With its witty humor, unforgettable characters, and satirical take on American culture, the sho… Go to the full soundboardwith more sound clips Search