to smell very bad (often with could, or would)
Damn, the smell of that those gym clothes is enough to knock a buzzard off a shit wagon if you'll pardon my language.
by The Return of Light Joker April 29, 2011
the ability to cause a stinch so profuse that the possibility of a buzzard being knocked off a shit wagon is actually thought of
His breath could knock a buzzard off a shit wagon.
by JKB March 12, 2004