A stiff fabric made of silk, wool, or mohair, often with a watered or rippled pattern, used for ribbons and clothing.
From French 'gros-grain' (coarse grain), which comes from 'gros' (coarse/big) and 'grain' (grain/texture), referring to the visible ribbed texture of the fabric.
Admiral Vernon (the 'Old Grog' of grog fame) famously wore a grogram cloak—so the two 'grog' words are actually connected through this one person and his clothing choices!
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