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1.
Someone who says that they are going to do something, and on the same day, they decide agianst this.

The reason given is usually not a true one, in order to cover their back.
Someone is going out with his friends, then 15 minutes before meeting up, he/she decides that they are not going to go as they have been asked not to or they can't be bothered etc so they tell everyone that they are going to 'pull the plug'.

If they tell the truth as to why they are not going then this is fine. If they do not tell the truth or more than three people find it questionable as to the reason for them pulling the plug then it will be deemed that the said person has in fact pulled the plug
by A none plug puller April 05, 2010
 
2.
Can be abbreviated to PTP.

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.
*timer*
0:60
...
0:50
...
0:30
...
0:10
...
0:00

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
by onebutters September 25, 2006