Much like the Molotov cocktail only with out the sophistication.
The mullet-top-cocktail comes from the backwoods of WestVirginia. It consists of simply a Millwaukee's Best beer and a fresh dip of snuff. This concoction is usually preferred by men who wear their hair as a mullet.
A mullet-top-cocktail can be used to describe any nasty drink.
Larry, this drink you made me tastes like a freaking mullet-top-cocktail!