The oof sound came from the 2000 video game Messiah, where it was recorded as a death grunt, and it later became the default death sound in Roblox. For years players heard it every time a character was eliminated, which turned a small grunt into a shared gaming in-joke. Roblox removed the original sound in 2022 after a licensing dispute and replaced it with a different death sound, but the classic oof had already spread far beyond the game through memes, edits and reaction videos, so creators still use it to signal a fail.