A slang term for a headache caused by wearing tight headphones and listening to music at the same time when asleep. The headphones cut off circulation to the head and produce discomfort in the head. The music projected from the headphones are repeatedly bashing your ear drums while you are asleep and slowly start producing one hell of a headache.
Victim of a Hernia: Ow! Man, my head hurts Josh!
Josh: That sucks. Don't fall asleep when listening to music next time.