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A fart that is smelt but not heard. Smellier than a standard fart because energy is not dissipated by the buttock-flapping sounds.
“Jeee-sus! Have you just let one off?”

”Yeah, sorry. Silent but violent.”
by King Kandy October 10, 2006
a fart that is like a silent bomb but instead of an explosion its a smell trained to kill noses.
Husband: Honey the dog did the "silent but violent" again.
Wife:I'll get the gas masks.
by human hot dog,mmm hot dog... July 04, 2010
When one is able to fart quietly but still keep the awful aroma circulating.
John: Dude did you you just pull a silent but violent?

Mike: No, but I think it was Emily. She's had a hostory of them.
by jisherjally September 10, 2013
What a smell, what a smell.

What a mighty bad smell.
by Gumba Gumba April 06, 2004