2. Someone who thinks everyone will die in a horrible tragedy if they do not log on at least once a day to post indie pictures, emo quotes, and naked Harry Potter pictures.
3. Generally, just someone who is fuckawesome.
2. If I don't get on tumblr right this second, Y2K is going to occur belatedly! No, I'm NOT a tumbladdict! I'm serious!
3. Guy: I have a tumblr.
Girl: Please have sex with my vagina now, you are a glorious tumbladdict please.