There is no widely documented origin for this short clip, and it is best understood as a small reaction sound circulating among French-speaking meme creators rather than a line from a known film or series. Its appeal comes from the single French word for heresy, turned into a joke about something being scandalously wrong, and the stretched greeting that follows it. Creators reuse it because it is instantly readable even without context, it fits the fast pace of short videos, and it works as a shorthand for playful disbelief.