Urban Dictionary defines it as:
A rabid breed of human female who is obsessed with either a fictional character or an actor. Similar to the breed of fanboy. Fangirls congregate at anime conventions and livejournal. Have been known to glomp, grope, and tackle when encountering said obsessions.
While Dictionary.com says:
An obsessive female fan, especially of something technological or from popular culture.
I agree with both. Dictionary.com’s version seems to be awfully vague, while Urban Dictionary only peeks at a certain type of lady nerds. I consider fangirls to be ladies who find themselves enthusiastic about things. We just really like things, all sorts of them! I know that I love Harry Potter, above all else. That doesn’t mean that I don’t have room for a serious love of Star Wars, Disney, or Harley Quinn. I like a lot of stuff.
And that’s okay!
Back to Urban Dictionary, I have been to conventions. I do enjoy a good hug (though I’ve never been able to truly handle a full glomp), and I have been known to touch my friends’ butts. That doesn’t mean every fangirl is like me though. When it all boils down, we’re just people. We’re unique. We’re also usually excitable and we may not like big groups, but I know that I feel quite the connection when I meet a fellow member of the dikrats.
But maybe that’s just me.