139 
4 
Download MP3 
The phrase is everyday Southern Vietnamese slang, written in standard form as Thôi Tôi Không Biết, and it spread online as a short reaction clip rather than as a song or movie quote. Its appeal is the timing: a complete, recognizable admission of confusion that fits almost any awkward pause. On soundboards and in short video edits it functions like a verbal shrug emoji, shared between friends and reused in remixes where the joke is pretending not to understand what just happened or what is being asked.
About this sound
Vietnamese voice clip of someone saying Thoi Tui Hong Biet, meaning I don't know, used as a confused or clueless reaction sound in memes and edits.
This is a short Vietnamese voice reaction built around the phrase Thoi Tui Hong Biet, which translates to I don't know. The delivery is casual and a little helpless, like someone shrugging off a question they cannot answer. It lands in just a few seconds, so the confusion reads instantly without any setup or context. Creators use that quick, flat admission to undercut serious moments, fake ignorance after a mistake, or play dumb in a conversation. The humor comes from how blunt and unbothered it sounds compared to the situation it is dropped into.
