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Someone who sends in post cards to Post Secret about things that everyone already knows or who brags about their secret being picked.
Josh was a Post Secret poser and would send in post cards every week about the time he pissed his pants at prom. Like no one would figure that one out.

"Tony, don’t be such a Post Secret poser. If you’re going to send in secrets shut up about it."
by Brett Burkhardt April 27, 2008
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