You can spot her from a distance.
A white girl, clothed in fringe, dip dyed hair, shorts, and whatever else is popular at the time. She has a camera turned at her, repeatedly pressing the button from different angles.
You may see her cropping these pictures and typing into her computer. Although you may not see it, she is finding some quote that doesn't make sense but seems hipster so she's putting it there anyways.
That's right. You've seen...
the tumblr girl.
John: Who's that? *Points to hipster taking 1,000 selfies*
Phil: Ugh, must be some annoying tumblr girl.