Top Definition
1.a person who is addicted to tumblr.com
2. a person that is on tumblr.com 24/7, and follows everyone they see
3. a person the promos massive amounts of pages on tumblr.com
4. a hipster
yo,is she a tumbl-head?
yea she reblogges everything!
by tumbl-head 101 March 30, 2011

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