The sound comes from Google Translate's text to speech tool, where users type slang phrases and record the robotic reading. It builds on the long running John Cena meme culture online, including the famous and his name is John Cena entrance joke that turned his name into a punchline by itself. Clips starting with bruh spread widely on soundboards and short video edits as a shorthand for disbelief. This version combines both trends, which is why it is still shared for Cena edits and random reaction posts.