The spelling here comes from the way the word is performed rather than from a film, song or television line, with extra letters added to show how long the shout is held. That kind of stretched typing is common in meme and soundboard culture, where a familiar word is exaggerated until the pronunciation itself becomes the joke. Short reaction sounds like this travel well because they need no context, fit neatly over gameplay, fails and surprise moments, and let creators signal amazement in under seven seconds without explaining the reference.