Country Dictionary

a silent but pungent instance of flatulence (from silent but deadly)

Damn! He just released a SBD.

some bad dick
some bad dick

A college girl came back from the health unit with gonorrhea. It was determined that her man had "SBD".

silent but deadly
refers to silent emits of gas from the ass hole that tend to smell like shit

holy shit? he let a sob!!

1.A stoned killer on socom 2.

2.A person who post definitions with many typo's on urbandictionary.com

SBD just wiped out half of thier team with a grenade!

Stop being dicks- Atlas (SoundCloud)

If we just #SBD this world would probably be a better place.

South Beach Diet

..which can lead to other forms of SBD as well.

Man, the SBD's got me. Not I'm always letting out an SBD.

Thas my gang bitches!! South Bay Drunks!!! for life! SBD MOTHER FUCKERS!!! come down to da south bay and claim that shit! see what happens!!

sbd mother fuckers!!!