Top Definition
Boring anti-social rejects who instead of spending their time taking pictures of their own, sit on their indie ass and reblog other peoples pictures. A tumblrfag can be found lurking at a party and laughing with their internet friends while everyone else is socializing in real life.
"Hey, do you have tumblr?"
"No i'm not a tumblrfag"

"Hey, do you like tumblr?"
"No I'm not a cunt"
by tumblrfag101 August 17, 2011

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