Ri ri ri means to fornicate or to have sexual relations with anyone or anything.
Two Guys the morning after a huge party.

Guy #1: So, dude, I saw ya headin upstairs with that Dara chick... What's the story there?

Guy #2: Fuck yeah dude, I took her up there a we were like ri ri ri all night long.
by ChaoticKitty March 23, 2008
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