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when someone steals a witty and/or funny tumblr post and uses it on another social networking site, posing it as their own.
Wow, that status is so uncharacteristically clever--she must be guilty of tumbliarism.

Did you see that picture he instagrammed? There's no way he took that great of a shot--it's totally tumbliarism.
by d1s June 17, 2013
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