The 'tewwwwtewwwww' sound comes from a user-generated soundboard upload with no credited creator, performer or source work attached, so its exact origin is undocumented. Like many small vocal memes, it appears to have spread simply because the syllable is fun to imitate and easy to drop into edits. Short, silly and instantly repeatable, it fits the current wave of micro-sounds that creators trade on soundboards and messaging apps, where a four-second goof can become a shared in-joke without any backstory at all.