Another gay instant messenger abbreviation created by losers with no life. Means "parent over shoulder." Used to tell the other person that your mom/dad is looking so don't type anything you wouldn't want them to see.
ChEeRcHiCk289: omg lyk u no who is lyk so hott?
SeXiPriNcEsS542: pos
ChEeRcHiCk289: um....what is our math homework SeXiPriNcEsS: ok he left
ChEeRcHiCk289: oMg! josh is soOo hott and i gave him head yesterday because im a slutty little cheerleader!
By Hildagard
Pos
Despite popular belief, it does NOT mean parent over shoulder (anyone who thought that obviously hasn't found the minimize button; you know, the button that hides shit). It does however, mean Piece of Shit.
Verb: Derived from Piece Of Shit. Meaning someone dissed you or put you down or made you look bad. Essentially someone made you look like a piece of shit.