Blubber is an item dropped by the Walrus upon death.
It is a very weak food and furnace fuel, and can be used to make torches. It restores 1 food (half a drumstick), but restores 2 saturation. It takes 32 ticks to consume, and is not classified as meat. When burned, it burns as fuel for 800 ticks (half of coal). It can be used in a crafting table instead of coal to make torches.