Made with Tequila and Ginger Ale, the Tequila Slammer Shot is tart and tangy party pleaser. The history of the Tequila Slammer Shot is unclear. It is believed to have originated in the 1930s, but its exact origins are unknown. Whether you are looking for a tasty cocktail or a fun way to start your night, the Tequila Slammer Shot is the perfect drink for you.