I'm a norm-nerd where I don't look or act nerdy, but I know a lot of nerdy things.
I used to wear glasses which for some reason just made me look nerdy even though they weren't nerdy glasses. To go with it, I bought a T-shirt that says "No, I will not fix your computer"
Just to add to that, I am not a geek, though I do go back and forth with Star Wars