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.
Phil: Ugh, must be some annoying tumblr girl.
For some reason, dumbasses think everyone wants be a tumblr girl when in reality nobody but hipster blogs gives two shits about them.
'Tumblr girl's can be boys or girls, who have a instinct for being 'Tumblr famous'. They are very usually popular, commonly annoying, and they conceive to their-selves with the word "swag"
Snog.Com is a perfect example, too.
"Oh, her? She's a tumblr girl. Don't expect her to tear her eyes away to socialize."
Also see hipster
regular girl: "Ugh no not a Tumblr Girl again."
tumblr girl: lol ya dat's right bby ya i'm hereeee c:
A. Fall in love, or
B. Not kill themselves
Or song lyrics as the caption. They are usually very pretty, but if someone comments on their picture like "You're so pretty!", they'll be like "I'm nowhere near pretty, but you're gorg!" They post pictures of their food and Starbucks, too. Oh yea, and they write in all lowercase. They'll never admit their a tumblr girl and they are either hippies or emo girls. They like vintage clothes by the way.
Normal girl: *Comments on picture* "OMG you're so gorgeous!!"
Tumblr girl: "I'm far from gorgeous, but you're perf♡"
NOTE: a tumblr girl can be either a boy or a girl, but the term itself remains the same regardless.