A guy who is on tumblr. He is attractive 85% of the time, and he is usually tumblr famous. It's common for a "tumblr boy" to be an attractive hipster. It of course doesn't matter what race they are, and they have nostalgic posts on their blogs, along with pictures of themselves.
Girl 1: omg mike is soooo cute! look at all those 90's pictures he drew on his binder.
Girl 2: I know, he's like a tumblr boy!
Girl 2: I know, he's like a tumblr boy!
by ThatKarateKid June 19, 2012
A handsome teen who posts pictures of himself on sites such as tumblr, Facebook, Instagram, and twitter, usually without a shirt
by Karneesha9 July 5, 2013