A blueberry mung is when a person mungs the corpse of another person that happened to die right when they had blue balls. This specific type of mung yields an extraordinary amount of mung juice per dig, though it should be noted that electric blueberry mungs should be avoided due to the fact that the corpse's testicles may explode into the face of the munger, thereby wasting precious mung juice.

when you're hungover as shit after a spending a night drunk as a skunk