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The Japanese word for a vicious little rodent who will eventually rule the world after a vicious land war that will take out half of humanity. The remaining people will become their slaves to tend their massive pecan plantations. See also, squirrel
If you don't hurry and pick those pecans, the risu in charge will gnaw your nose off.
by Mr Risu April 04, 2007
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"Hay sup Bob did you see that fucking sweet kid just a second ago?"

"Shit yeah, negro, that was Risu."
by tbombadil May 03, 2007
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