Literally means someone who pulls the ethernet cable out of their computer during a game. This is typically done when the plug puller is losing the game and wants to quit, but does not want to be blacklisted. The purpose is to put forward a pretense that they lagged out and did not quit.
Plug pullers often have the mistaken belief that other players will actually think they lagged out, when in actual fact it provides more incentive to blacklist the perpetrator because it means that others must wait 60-70 seconds rather than have it over quickly.
Player1 has left the game
Player2 (All): HAHA pull the plug!
Player3 (All): Goddamn, not another plug puller, why don't they just quit outright?!
Player2 (All): ...remake