What is the name of a small quantity liquor?

There isn't one specific name for a small quantity of liquor. The terminology used can vary depending on the context and region. Here are some possibilities:

General Terms:

* Shot: This is the most common term for a small serving of liquor, typically 1.5 ounces.

* Pour: A more general term used to describe any amount of liquor poured into a glass.

* Sip: Refers to a small amount of liquor taken in one small drink.

* Taste: This is used when you want to try a small amount of liquor before committing to a full drink.

More Specific Terms:

* Pony: A small drink of liquor, usually 1 ounce.

* Jigger: A measuring tool used to measure out liquor. It is often referred to as a "jigger shot".

* Miniature: A small bottle of liquor, typically 50 ml.

* Sampler: A small serving of liquor offered as part of a tasting event or flight.

Other terms:

* Cocktail: While a cocktail is usually a mixed drink, some cocktails use very small amounts of liquor.

* Cordial: A sweet, liqueur-based drink that is often served in small quantities.

Ultimately, the best way to describe a small quantity of liquor is to be specific about the amount (e.g., "a 1-ounce pour") or the type of serving (e.g., "a shot").