grog

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.[1][2]
Alternatively from Catalan groc (“yellow”), the colour of the low-quality alcohol.[3]

This etymology is incomplete. You can help Wiktionary by elaborating on the origins of this term.

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• Rhymes: -ɒɡ

grog (countable and uncountable, plural grogs)

1. (original meaning) An alcoholic beverage made with rum and water, especially that once issued to sailors of the Royal Navy.
2. (by extension, Australia, New Zealand) Any alcoholic beverage.
3. (countable, Australia, New Zealand) A glass or serving of an alcoholic beverage.
4. An alcoholic beverage made with hot water or tea, sugar and rum, sometimes also with lemon or lime juice and spices, particularly cinnamon.
5. (ceramics) A type of pre-fired clay that has been ground and screened to a specific particle size.

   Synonyms: chamotte, firesand

• groggy

• grog on Wikipedia.Wikipedia

• gorg

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grog m (plural grogs)

1. grog (drink made from rum)

• “grog” in le Trésor de la langue française informatisé (The Digitized Treasury of the French Language).