Top Definition
A person who comments on pictures/statuses that they are entirely unrelated to and unwelcome in.
Steven: Haha. Do you remember that time we went camping?
Erica: Yeah. That was way fun!
Caitlin: Haha. You look like you guys were punched in the face before this picture was taken. Lol!
Stephen: Man, Caitlin is such a god damn post pirate.
by Warren Buffet jr. December 04, 2008

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