What is a "Poe" and why do people keep calling me one?

On every question I ask I get NO good, thoughtful answers from atheists but I DO get lots of them calling me a "Poe." I can't help but think I'm being insulted somehow. Does it stand for something like an acronym? Maybe if atheists spent as much time studying the Bible as they spend coming up with new ways to insult Christians they wouldn't be so lost.