Urusai comes from Steins;Gate, the Japanese science-fiction visual novel released in 2009 and adapted into an anime series in 2011. Kurisu Makise, a young neuroscience researcher and one of the story's central characters, often uses the word when she is annoyed, especially during her sharp exchanges with Rintaro Okabe. Fans clipped her blunt delivery and shared it as a reaction sound, where it spread through anime edits, meme videos and soundboards. It remains popular because the single word is instantly understood, even by viewers who do not speak Japanese.