The phrase comes from the long-running American reality competition Survivor, where host Jeff Probst calls 'Survivors ready' before shouting go to start a challenge. Fans recognise it instantly as the signal that a physical or puzzle contest is about to begin, and clips of the call have circulated widely as a short reaction and countdown sound online. It remains popular because it carries the tension of a televised competition in under six seconds, making it easy to reuse for races, games, workouts and friendly contests without needing the full show for context.