Short spoken catchphrases like this spread through meme soundboards because the wording is simple, instantly quotable and flexible enough for many contexts. The oh yeah boy line has no widely confirmed single source attached to this recording, so its life online is mainly as a reusable reaction clip. Creators lift it for gaming highlights, prank reveals and exaggerated celebrations, and the longer duration helps it work as both a punchline and a build up. Its popularity comes from tone rather than context, allowing viewers to get the joke without knowing any original scene.