What is a Flyer?

So its the Flyers and Blackhawks for the Stanley Cup final. I'm not sure how excited I personally am for this. But it could be a good series. And both clubs have a lot of loyal followers. So in their eyes, it's a beautiful sight. And in my eyes, I hope for Sharp and Versteeg to get me some points in the draft! I'm closing in on $100. Ha!