to murk; a term commonly used by black people and wannabe gangstaz, it means to beat-up/hurt/kill another person.
black guy 1: yo blad, you shoulda peeped it las' nite.
black guy 2: why son? what went down?
black guy 1: well we woz cotchin' down near TJ's when some white foo' went. "wot u boggin' at nigga"
black guy 2: oh no the fuck he di'nt?
black guy 1: nah! blad, dis is da gospel truth!, anyway i rolled on up to dat toy and murked him, innit. left him bleedin there, that toy-ass biatch.
black guy 2: SAFE!