In online gaming getting "merc'd" is to get defeated in the extreme by another player. The slang origin became adopted in online gaming taken from known player (TTK)Mercenaries; During the highlight era of Call of Duty 4: Modern Warfare, for sometimes seemingly almost impossible kills and kill/death ratios. While being at some times "silly", for example bunny hopping or battling through a session with a weak pistol while still maintaining control of the map.
The only video released by (TTK)Mercenaries, showing a small handful of his random aliases.
Ruler of Lake Titicaca. Rumored to have a bunghole that gets very angry if it does not receive toilet paper. Cornholio the Great is often seen walking around with his shirt over his head and his hands in the air, chanting songs about his power, and his bunghole.
"I am Cornholio! You do not want to face the wrath of my bunghole, for I need TP!"
Butthead: Shut up, Beavis! (uh huh huh huh)
Beavis: Um, okay. (heh heh heh heh).