Real-life PK (player killing). Refers to the very rare instances where players of MMORPGs would be driven to kill other players in real life, rather than just in-game (see player killing). Usually this happens as an act of revenge over some horrible grievance that would occur in-game, as is the case in 2005 of a Shanghai man who stabbed his (former) friend to death for betraying him and stealing a sword they had won together in the MMORPG "The Legend of Mir 3".
Josh was so angered after Steve's character had killed his character for the 6th time, that for a moment he seriously pondered finding out Steve's address and RLPK'ing him.
by Nilac The Grim November 27, 2010