1 definition by Muumuu House

A girl (or boy, but generally a girl) who thinks that re-blogging photos from their parent's basement on a MacBook that they didn't buy with their own money is "being an activist" when in reality they have probably never gone to a protest, fundraiser, or meeting for any social justice organization and probably never will cause any civil change in their lifetime. Similar to a "Facebook Activist" a la the Kony 2012 viral video.

A Tumblr Feminist will also post pictures of themselves naked or half-naked on the internet and claim it is "art" and attack any person who talks about their body (despite the fact they posted their tits on the internet).
"Amy is a total Tumblr Feminist, one time she wrongfully accused that guy of rape just to get some twitter followers."
by Muumuu House December 21, 2013
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