Horrid Henry is a British animated children's series based on Francesca Simon's books, centred on a mischievous schoolboy who is always getting into trouble with his brother Perfect Peter, his parents, and his teachers. Short, exaggerated reactions from the show have become popular as meme audio because they are instantly recognisable and easy to drop into a punchline. This long nooo circulates online alongside other reaction sounds like the scream meme, and it stays in use because a single drawn-out cry can turn ordinary bad luck into a joke without needing any explanation.