Top definition
1. A "Silent But Deadly" fart. See also "ghost turd" and "air biscuit".

2. The airport code for San Bernardino International Airport.

3. The Douglass Dauntless, an American World War II dive-bomber aircraft.
I can still fly my fume-belching SBD out fo SBD because it's quiet enough.
by Warren Fwy October 03, 2005
Get the mug
Get a SBD mug for your buddy Jerry.
A quiet flatulent that makes its presence known by a foul odor; "silent but deadly"
Woo, baby, you blow out another SBD on me or what? Damn!
by Ric Dog June 06, 2003
Get the mug
Get a SBD mug for your buddy Zora.
"Silent But Deadly"
fart that makes a noise like "pfffft"
usually warm in temperature and eminating an offensive odor
Man, i gotta get the fuck out of this elevator, someone cut an SBD!
by Fartdust December 11, 2003
Get the mug
Get a SBD mug for your father-in-law Josรฉ.
A Douglas Dauntless airplane from World War II.

A silent but foul fart. "Silent but deadly."
Lieutenant Walters climbed into his SBD and shouted at Sergeant Powers, who had left an SBD in there.
by The Wog Whomper May 11, 2005
Get the mug
Get a SBD mug for your Facebook friend Trump.
An audio-phile abbrevation for a soundboard recording. This recording is taken directly from the main line output of the mixing console also called a soundboard. Also see DSBD.
"10-10-94 Phish live at Bryce Jordan Center, State College, PA, SBD, set 1"
by radaeon October 03, 2005
Get the mug
Get a SBD mug for your guy James.
Silent But Deadly! unfortunately an all too familiar odor eminating mysteriously around groups of people, survivable outdoors, but toxic in an enclosed space, in which everyone looks around trying to figure out who let rip (even the smirking perpetrator).
sitting in the back of a pick-up truck with a group of friends on our way to lollapalozza, when suddenly the driver's side window rolls quickly down and the driver sticks his head out the window screaming "S.B.D.!S.B.D.!" dousing the front cab with ozone, while the guy riding shotgun is laughing his guilty arse off. if especially deadly, DO NOT be stuck downwind, i.e. in this case, riding in the back of an open truck slowly, or worse, trapped in the car itself.
by AngelWolf May 26, 2006
Get the mug
Get a S.B.D. mug for your friend Larisa.
A silent but deadly binderfender, of the type typically emitted by a nice lady in church.
Mrs. Posselthwaite sat in the back row in church. She blewan SBD. The parson stopped his sermon, crinkled up his nose, and fanned himself with his notes. "Whoa!" he said. "Was that you, Clarissa?"
by Delicious Tuna Wanda September 25, 2007
Get the mug
Get a sbd mug for your bunkmate Trump.