The clip comes from Mu Xiaokong, a Chinese VTuber whose short vocal moments circulate as reaction sounds among fans. The 'tui' itself is a one-syllable spit-like exclamation, a familiar piece of Chinese internet slang used to playfully shoot down a statement. At under two seconds long, it was uploaded to a user-generated soundboard where listeners play, share and download it as an MP3. Its charm is its size: a tiny, reusable burst of attitude that fits anywhere a longer rant would not.