Shortform for Player 2. Traditionally, the second player in a video game (e.g. the Super Nintendo supports two controllers; Player 1 and Player 2).
Older generation video games did not support text for Player 1 or 2. It was shortened to P1 and P2. Today, games support multiple players either off-line or on-line; making the word obsolete.
For the geekier/nerdier audience today, p2 can be used romantically as a substitute for Valentine in the phrase, "Will you be my Valentine?" It is cliched that this audience will often spend their Valentine's Day playing games by themselves as Player 1. Consequently, they will invite the boy/girl of their dreams to join them as Player 2, happily playing the game together.
Losing an enormous amount of personal property to the point where someone cannot even take items with him/her out to a club because it is excessively clear that he/she will lose them.
Dude, that guy is a complete P2! He lost 5 iPhones, his debit card and $800 in different foreign currencies in a month! Not to mention his dignity...
Yo, you'd better leave your phone at my apartment - I'm pretty sure you're gonna pull a P2 tonight.
West Midlands slang word for rockers, bikers, greasers etc. In the late 1980s it was used by the UK music press to refer to a specific scene centered around the bands Pop Will Eat Itself and Crazyhead. The term never found favour with readers of 'the inkies' (Sounds, Melody Maker and the still extant NME) and was soon dropped. Now often used in predominantly working-class areas of the midlands and the north to mean someone who listens to rock-derived music and/or dresses in a manner that suggests they affiliate themselves with rock music of some kind.
Some grebo passed with Sabbath playing on his stereo.
The Poppies are at no. 17? God, a grebo band in the charts!
They're playing nu-metal now, bloody grebos!