Josh McRoberts last night got T'd up for a throwing an arm bar at LeBron James. McRoberts hasn't been around for very long but he's rapidly building up a reputation as one of the NBA's dirtiest players.
I want to zero in on what I mean by "dirty" here. I mean delivering cheap shots or actually intending to hurt other players. There are other types of players that are sort of "cheaters" but aren't really dirty.
I'm distinguishing form the mere flop artists or exaggerators here. I'm talking about players who actually could intentionally or unintentionally hurt someone through reckless disregard for other players safety by their actions. I'm talking about the dirtiest players.