The Clapper began as a sound-activated electrical switch sold through American television commercials, where a device plugged into a wall outlet let viewers turn lamps and appliances on or off with two claps. The simple slogan and repetitive jingle made the ads unusually memorable, and they were replayed and parodied for years. As the commercials entered nostalgia and meme culture online, the catchphrase became shorthand for a clever but lazy solution, which is why creators still reuse the sound for reaction clips, pranks and light-switch jokes today.