grog Share definition Flag A kind of beer or lager that is usually consumed by mighty pirates with a side of pretzels. Yarr, I'm Guybrush Threepwood, mighty pirate! I drink my grog and plunder the mysterious isles of Lucre, Jumbalaya, and Monkey. grog by Puchie D November 11, 2002 0 0 Get merch Get the grog mug. Buy Now — $32.95 See more merch