The Wailing Caverns or wc is an instance in World of Warcraft for approximately levels 15-21. An extraordinarily long and overly complicated dungeon, with poor groups (pugs) it can take a horrifyingly long time, though the rewards (xp and items from quests, plus loot and xp from killing mobs) sometimes make it worth it.
Usually, however, it takes way longer than expected, making your ass fall asleep and become numb. Can be used whenever something forces you to stay at the computer far longer than expected.
Burned-out raider: Oh god, this naxx25 started out so well, then we wiped on 4horsemen for so long I got some major Wailing Caverns Ass.
Whilst close to climax during any form of penetration, proceed to remove your organ and quickly stand up whilst waving your arms rapidly making a strange but somewhat satisfying yelping noise.
Being a passenger in a car with a driver unaccustomed to driving a car equipped with manual transmission, staying in first gear way too long, resulting in a jerky, head-bobbing motion, i.e. like the pilgrims at the Wailing Wall.
Every time I get into the car with Scott's sister, we end up driving to the wailing wall for the first three or four traffic stops.