silent but deadly(redirected from silent-but-deadly)
silent but deadly
1. adjective, slang Of an instance of flatulence, making no sound but having an extremely offensive odor. For some reason my farts are always silent but deadly.
2. noun, slang An instance of such flatulence. Someone let out a silent but deadly! Quick, open a window! OK, who's responsible for that silent but deadly?
silent but deadlyand SBD
mod. [pertaining to a release of intestinal gas] soundless but smelling horribly. Who floated that SBD air biscuit?