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When a fart can be emitted so silently yet its strong enough to floor a rhino.
Eating a Meat-Lovers pizza gives you silent-but-deadly ass-gas.
by Didda Tinkle May 24, 2004
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Oct 30 Word of the Day
A trick played on a fellow athlete where the open hand smacks the target's testicles with the knuckles in a sharp, wrist flicking motion.
"Dude, I sack tapped Brandon, and now he has the whole team trying to sack tap me"
by Chris M July 07, 2004
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2
A creeper, a floating air bisquit. A fart that can not be heard but can sure as hell be smelt. This type of flatulent sneaks up on you and unless there is a breeze, hard to tell who it came from. Don't ever recognize this type of fart out loud otherwise you fall into the rule of: "Whoever smelt it delt it"
by D. Ferrel September 29, 2003
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3
A fart that is not heard, but smells so horrid that it could kill; also: Silent but violent, SBD
Your farts aren't that bad when compared to Grandpappie's ol' silent but deadlies.
by King Shit January 16, 2003
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6
Not a spleecher or a barfoom in that the originator of these stinkbombs cannot be detected until it is too late.
Some broccoli-munching vegan cut a silent but deadly stinkbomb on the bus. Eat meat, twerp!
by Cosmicstargoat April 22, 2004
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