IPA: //ɡrɒɡ//
KK: /grɔg/
A type of alcoholic drink, often rum mixed with water, and sometimes served hot with lemon juice and sugar.
After a long day at sea, the sailors enjoyed a warm cup of grog to relax.
The word 'grog' originates from the 18th-century British naval slang, named after Admiral Edward Vernon, who ordered that rum be diluted with water and served in a wooden mug called a 'grog tub'. The term 'grog' itself is believed to derive from 'grog' (meaning a mixture of rum and water).
Think of a naval drink that mixes rum with water, which is what 'grog' refers to.