When a male forms his scrotum into shape of a bowl to create a shot glass. He then pours tequila into the bowl portion, lines the rim with salt, and squirts a layer of lime juice on his penis. Then someone licks the salt, takes the shot, and laps up the lime juice.
Used widely by people drag racing or doing illegal street races online. It would say filmed in mexico in the description or even in the title when it is pretty obvious it was filmed somewhere around the United States.
The name for the condition you find yourself in when you have imminent blowout diarrhea and are in the last steps of a hurried dash to the nearest toilet.