So a friend just described munging to me.

"The one thing worse than genocide. One must first have no shame. Then he/she must use a newspaper to find the obituary of a recently deceased man or woman. Then must find a buddy, with no shame, who will aid them in this act. The partners then go to the cemetary where they dig up their victim, and flip a coin. The loser, (or winner depending on how sick you are), applies his/her lips to the genitals or anus of the corpse, while the other partner procedes to climb the nearest tombstone and elbow drop the corpse's stomach. Thus forcing out a blend of rich bodily fluids and embalming materials onto the partners. This blend is called mung. The act of getting this blend on your face is called munging. Chicks'll dig this one."