No confirmed source, character or original clip is known for this sound, which is common for short user uploaded meme audio that spreads by its phonetic name alone. It circulates online purely as a reaction noise, shared on soundboards and pasted into edits because the garbled eh pooweggeh spelling is how people remember and search for it. Its appeal has stayed consistent: it is short, meaningless and instantly signals confusion without needing any context from a film, show or game to understand.