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

Free Daily Email

Type your email address below to get our free Urban Word of the Day every morning!

Emails are sent from daily@urbandictionary.com. We'll never spam you.

×