Poitín, anglicized as poteen or potcheen, is a traditional Irish distilled beverage. Former common names for Poitín were "Irish moonshine" and "mountain dew". It was traditionally distilled in a small pot still and the term is a diminutive of the Irish word pota, meaning "pot". The Irish word for a hangover is póit. In accordance with the Irish Poteen/Irish Poitín technical file, it can only be made from cereals, grain, whey, sugar beet, molasses and potatoes.

Liquor is an alcoholic drink produced by the distillation of grains, fruits, vegetables, or sugar that have already gone through alcoholic fermentation. Other terms for liquor include: spirit, distilled beverage, booze, spirituous liquor or hard liquor. The distillation process concentrates the liquid to increase its alcohol by volume. As liquors contain significantly more alcohol (ethanol) than other alcoholic drinks, they are considered "harder." In North America, the term hard liquor is sometimes used to distinguish distilled alcoholic drinks from non-distilled ones, whereas the term spirits is more commonly used in the UK. Some examples of liquors include vodka, rum, gin, and tequila. Liquors are often aged in barrels, such as for the production of brandy and whiskey, or are infused with flavorings to form flavored liquors, such as absinthe.