On the Rocks
A drink poured over cubes of ice.

Poussé-café
A drink made of different alcohols arranged into colorful layers, like the American Flag.

Proof
A proof is the percentage of alcohol in the liquor—most spirits sold in American stores print the proof on the outside of the bottle. 100-proof equals 50% alcohol by volume. The higher the proof, the quicker you'll get tipsy, so be careful!

Shaken
All drinks that include juices, creams and liqueurs should be shaken in a shaker to distribute the flavor.

Simple syrup
You can buy this mixer in a store or make it at home. To make it yourself, combine one or two cups of granulated sugar (depending on how sugary you want it) with 1 cup of  boiling water in a saucepan. Bring the mixture back to a boil. Leave it to cool and pour it into an airtight container to save for later.