Top Definition
Someone one is constantly on Tumblr, posting, reblogging, and liking things. Often times a person who runs a blog that has lots of followers, a top-blog wannabe, someone with no life, or someone who is spending all of their time on Tumblr instead of Facebook.
Dude, you're a Tumblraholic. You need some help.
by fellowtumblraholic September 11, 2010

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