Stanky Dirt Bug is slang from the "Dirty South". Its derived from stanky, to stink. If someone is a "Stanky dirt bug", they probably smell like poo poo.
Much like clam slapping yet with B-holes.
Very similar to muff mashing except you use your shit hatch.
Think of the Twat Taco Tuesday Watoosi but replace the Twat tacos with Brown Corn Ports