RPK for Random Player Killer, for online games, meaning a player who enjoys randomly killing other players for no reason other than enjoyment of the killing itself.
Dude, I hate LoD, they are nothing but a buch of random RPKer's. All they do is gank people.
by [LK]Myrik December 10, 2004
A common russian automatic rifle, often associated with the AK74su. Highly comparable to the SAW light machinegun.
I got RPK's, AK74's, AK47's, M4A1's, M40A1's, M82's, and a Dragunov.
by Detranova July 29, 2003