What is your definition of a Nerd?

I haven’t been able to figure out how is it like to be a Nerd. I’m sure there are so many Nerds scrolling up & down, tapping the mobile keys on grapevine.

Define yourself if you think you are a Nerd. What’s the one thing that makes you behave like a Nerd? What’s the quality that you bring to fore as a Nerd? This is an open question. Feel free to add anything that you characterize about being a Nerd.

People that have observed Nerdy behavior in others can also share their thoughts.