Wololo comes from the priest and monk conversion audio in the Age of Empires series, especially remembered from the original game and Age of Empires II in the late 1990s. The chant became a long-running gaming meme because players instantly connected it with stealing enemy units and flipping control. Online, people use it whenever someone changes sides, changes their mind, or gets symbolically converted. Its staying power comes from how short, strange, and recognizable the vocal cue is even outside the game.