The exact origin of this blublublub clip is unknown, and the name simply spells out the noise it makes, like a written imitation of bubbles in water. Short glugging sounds like this have long been a staple of cartoons, games and comedy sketches for underwater scenes, and they spread online as reusable reaction audio for edits and memes. Creators keep returning to it because the meaning needs no explanation, works over almost any footage, and fits everything from sinking ships to exaggerated drinking without needing dialogue or music underneath it.