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
something that, when combined with a dutch oven maneouver, is an excessive use of deadly force.
by Greg April 29, 2004
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
Legend has it that a man named Pierre Chappele, when on a recon mission, he found an enemy that was going to the bathroom.

Pierre snuck up behind him and slit his neck, his last words sounded like a mild fart.
Silent But Deadly is now used as a military term to describe an AWOL (Absence without leave)
by Not Zane July 23, 2004