1 definition by Cephas777

Top Definition
(n.) a male reproductive organ in which the testicles are greater in mass than the penis

also spelled: rooroo,roohrooh,riuriu,rewrew,rowrow

(the u's are umlauts)
His ruru was so large that when he walked it looked like he had to take a leviathan excrement.
by Cephas777 February 25, 2008

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