Grog, spirits and cold water, without sugar. The quaint name of grog is said to be derived from a nickname of Admiral Vernon, who in 1745 ordered his sailors to dilute their spirits with water. He was known to his men as 'Old Grog' from his wearing grogram breeches.
Grog
Chambers's Encyclopaedia, Volume 5: Friday to Humanitarians, p. 428
Source scan(s): p. 0443