Without a confirmed movie, show or viral source attached to this clip, it has spread simply as a reusable reaction line on soundboards and in short form edits. The phrase itself is everyday slang for disbelief, and the bro at the end makes it feel casual, confrontational and meme ready at the same time. Creators reuse it for gaming losses, sports blunders, prank reveals and comment style videos where a spoken reaction says more than a caption, which keeps the short clip circulating long after any single post.