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- Someone who farts are SBD (Silent but deadly)
- A person who regularly passes gas in a way that can not be heard but is obvious from the foul odor.
That's disgusting! You muzzlebutt!
Frank is such a muzzlebutt.
by Anthony N. May 24, 2007

Words related to muzzlebutt

blow ass fart farting farts gas sbd shart