Estus Flask Share definition Flag An undead favorite. A gankers best friend. Probably tastes like Sunny-D. "I was darkwraithing in anor londo, and some little shit ran away and drank about 15 estus flasks!" Estus Flask by Nastycracker30 September 1, 2013 0 0 Get merch Get the Estus Flask mug. Buy Now — $32.95 See more merch