Irish whiskey Act, whiskey produced by registered distillers was known as "Parliament whiskey", while that produced by illicit producers was, and still is referred to as "Poitín", a Gaelic term meaning "small pot" (often anglicised as poteen) in reference to the small pot stills used by the illicit distillers. However, although traditionally the product of illicit production, many legal varieties of "Poitín" have come to market in recent years. In the 18th century, demand for whiskey in Ireland grew significantly, driven both by strong population growth, and by displacing the demand for imported spirits. Growth in the latter is very much visible
Irish whiskey in the share of Irish duties paid on legal spirits in the late 1700s. In 1770, whiskey only accounted for 25% of the total duty on spirits received by the exchequer, while duty on imported rum accounted for 51%, with the remainder divided equally between brandy and gin. However, by 1790, only twenty years later, whiskey's share accounted for 66%. As a consequence of this increased demand, some distillers prioritized quantity over quality, to the detriment of their product. This prompted parliament to pass an Act in 1759 prohibiting distillers from using any ingredient other than malt, grain, potatoes or