Marrow mung is the act of finding and digging up the most ancient of corpses. Once said corpse is located and dug up, the participant and his associate must mung the marrow out of the bones. Whatever pours out is the best of all mung. The dustier the better!
Clayton: "I marrow munged the shit outta that pharaoh!"
Matt: "Nigga you the MUNG KING! Free Earl!"