a strong alcoholic drink, originally rum, mixed with water 格洛格酒（用朗姆酒兑水制成的烈酒） - (Australian English, New Zealand English, informal)
any alcoholic drink, especially beer 酒（尤指啤酒）
Word Originmid 18th cent.: said to be from Old Grog, the reputed nickname of Admiral Vernon (1684–1757), who in 1740 first ordered diluted (instead of neat) rum to be served out to sailors.