Sarah told me she was groggy this afternoon, and I asked "From too much grog?" and the ensuing discussion led me to realize I didn't know where the word "grog" came from.
Turns out, believe it or not, that it's an eponym: comes from "Old Grog," the "nickname of Edward Vernon [...,] English admiral responsible for diluting the sailors' rum." Says MW11.
Of course, there's also the question of why Vernon was known as Old Grog.
Anyway, hoping your New Year is as ungroggy as can be reasonably expected.