SBD

silent but deadly

and SBD

mod. [pertaining to a release of intestinal gas] soundless but smelling horribly. Who floated that SBD air biscuit?

verb

Name	Pronounced	Usage
RÍOnach	-	Irish
Angjelko	-	Macedonian
Shayla	SHAY-lə	English
Katharine	['kæθərin]
Pallas (1)	PAL-əs (English)	Greek Mythology
Blanch	BLANCH	English