Guinness

Etymology
An Anglicization of an patronymic surname based on Angus.

Proper noun

 * 1)  A brand of dark stout beer from Ireland, one of the most widely recognised brands of beer in the world, named for  who first brewed it.
 * 1)  A brand of dark stout beer from Ireland, one of the most widely recognised brands of beer in the world, named for  who first brewed it.

Noun

 * 1)  A serving of the beverage.