Gill (unit)  The gill or teacup is a unit of measurement for volume equal to a quarter of a pint. It is no longer in common use, except in regard to the volume of alcoholic spirits measures. In Great Britain, the standard single measure of spirits in a pub was in England, and in Scotland, while the was also a common measure in Scotland, and still remains as the standard measure in pubs in Ireland. After metrication, this was replaced by measures of either , at the discretion of the proprietor. Half of a gill is a jack, or an eighth of a pint. But in northern England, a quarter pint could also be called a jack or a noggin, rather than a gill, and in some areas a half pint could be called a gill, particularly for beer and milk. In Ireland, the standard spirit measure was historically  gill. In the Republic of Ireland, it still retains this value, though it is now legally specified in metric units as . In Scotland, there were additional sizes:  There are occasional references to a gill in popular culture, such as in:     Because of its more widely used homograph, gill is often mispronounced with a hard 'g' sound.