A shooter, or shot, is a small serving of spirits or a mixed drink, typically consumed quickly, often in a single gulp. It is common to serve a shooter as a "side" to a larger drink.
Shooters can be shaken, stirred, blended, layered, or simply poured. Shot glasses or sherry glasses are the usual drinkware in which shooters are served. They are most commonly served at bars, and some bartenders have their own "signature" shooter.
The ingredients of shooters vary from bartender to bartender and from region to region. Two shooters can have the same name but different ingredients, resulting in two very different tastes.