The title comes from the Russian word БУЛЬК, an onomatopoeia for the glug made when air escapes through liquid or something drops into water. Short clips like this spread through meme soundboards and voice effect apps, where a fraction of a second is enough to become a reusable reaction. Its appeal is simplicity: one wet pop can replace a caption or facial expression. Editors keep returning to it because it fits cartoons, gaming clips, and everyday fails without needing any setup or explanation for the joke to land.