- an alcoholic liquor, esp. rum, diluted with water
- any alcoholic liquor
Origin of grogafter Old Grog, nickname of British Admiral E. Vernon (1684-1757), who ordered the sailors' rum to be diluted: so called because he wore a grogram cloak
Origin of grogAfter Old Grog, nickname of Edward Vernon (1684–1757), British admiral who ordered that diluted rum be served to his sailors, from grogram (from his habit of wearing a grogram cloak).
An allusion to Admiral Edward Vernon (nicknamed "Old Grog" after the grogram coat he habitually wore), who in 1740 ordered his sailors' rum to be watered down. Also claimed is:From Catalan, groc (yellow), the colour of the low-quality alcohol.