Ranu means anything that the speaker wants it to mean. It is a conversation filler and can replace any word. Ranu is anything and everything. It is a noun/verb/adjective rolled into one perfect word.
Chase: Dude did you get the ranu?

Kevin: Ranu bro, dont worry about it.

Chase: Alright man, ranu.

Kevin: Yea peace. I'll ranu to you tommorow.
by Master of Ranu April 11, 2011
(Pronounced ray-nus) The act of a male raping many female anuses.
Tonight the boys and I planned on going ranusing downtown.
by Timmah69 October 03, 2010

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