Top Definition
An exteme stretch of the right leg that leads to a muscle strain in the right upper ball area (ruba). Occurs in numerous kama sutra sexual positions and can be debilitating for the male. Also occurs in athletic events, rock climbing, and general stretching.
"Holy shit babe, I cant keep my foot on the back of your head while doing you doggie - its a ruba wrencher!"
by mondotronix March 08, 2012

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