An alcoholic shot consisting of waste liquor lying on the black rubber bar mat. The bartender lifts the rubber mat and pours the mysterious contents into a shot glass. Another alternative is to wipe the bar table clean with a rag and wring the liquids into a shot glass. This shot usually is free. Also known as L.A. traffic jam and cespool
I ordered a Grey Snail and saw the bartender lift the rubber mat and pour it all into a shot. It was the worst shot I ever tasted, but you can't complain if you want to get drunk for free
by TooWheels August 28, 2009