1 definition by Rajun Caucasian

Top Definition
When a thread on a message board starts as one thing and evolves into something else.
This thread started as a discussion of health care and now it's just pictures of hot nurses. I approve of this threadvolution.
by Rajun Caucasian January 22, 2010

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Lotsa space for your liquids.

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The Urban Dictionary Mug

Your favorite word on a white mug.

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