grog UK /ɡɹɒɡ/US /ɡɹɑɡ/noun 5verb 2forms 3 noun5 •An alcoholic beverage made with rum and water, especially that once issued to sailors of the Royal Navy. •An alcoholic beverage made with hot water or tea, sugar and rum, sometimes also with lemon or lime juice and spices, particularly cinnamon. •(Australia, New-Zealand) Any alcoholic beverage. •(Australia, New-Zealand) A glass or serving of an alcoholic beverage.Joe […] told them how he had been nailed up to be beaten, and they shouted another grog for him. — 1950 •A type of pre-fired clay that has been ground and screened to a specific particle size. verb2 •(slang) To drink alcohol. •To grind and screen (clay) to a specific particle size. formsgrogged · grogging · grogs