Barnacle Boy is the retired superhero sidekick from the long-running animated series SpongeBob SquarePants, known for his grumpy patience with Mermaid Man and their young fans. The warning comes from his exasperated attempts to keep visitors from meddling with superhero equipment, a running joke in the show. Shared widely on soundboards and in short-form videos, the line has become shorthand for any moment when someone is told not to interfere but does so anyway, keeping it useful for reaction edits and meme compilations years after its original broadcast.