Originated on the World of Warcraft forums, meaning:

Post on your main, pussy.

Many players would choose a lower and lesser known character as their avatar to flame, or "troll" others, in order to avoid notoriety in the community. This statement is used to say "Get on your main character or shut the fuck up."
Asshole: "You are a terrible player and you suck at your roll"

You: "POYM,P"
by FookU... April 13, 2009
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