The phrase comes from Monty Python and the Holy Grail, the 1975 British comedy film, where a moment of triumph is summed up with the line and there was much rejoicing. Online, the short cheer behind that idea became a reusable reaction sound, shared on soundboards and clipped into videos whenever something unexpectedly works out. Its appeal is its brevity and warmth: in about two seconds it signals a happy ending without needing the original scene, which is why creators keep reaching for it for wins, reveals and deliberately exaggerated celebrations.