A word coined in online gaming by Traitornator and Azrakel225. It is a general term, used to describe somebody who just got utterly pwned. Usually the pwn involves a surprise attack while the victim is busy, thus catching him/her unaware of the attacker. As such, a person can only be murk'd if he is killed by the first, second, or (sometimes) third bullet. After the 3rd shot the person is considered aware, and thus cannot be murk'd.
Ya' got murk'd son, murk'd.