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The phrase silent but deadly, often shortened to SBD, has been a playground joke for decades to describe a fart with no sound but a strong smell. Online, editors turned that idea into a soundboard clip, using a tiny puff effect sourced from royalty-free libraries like the one credited in the file tags. It spread alongside other comedy staples like the standard fart and the fart meme sound, and it remains popular because the near-silence lets creators build the joke entirely around timing and facial reactions.
About this sound
A short almost-silent fart sound effect that makes a big impact. Known as SBD, this quiet puff is used in videos for sneaky, embarrassing comedy moments.
This clip is the classic silent but deadly effect, a very short and nearly inaudible puff of gas that lasts just half a second. There is almost no sound to hear, which is exactly the joke, the comedy comes from the pause afterward and everyone reacting to the smell instead. It flips the usual loud fart gag, so it lands best when the character on screen looks innocent while everyone around them slowly realises what has happened.
