Top Definition
To jack off or masterbate. It origin comes from the vibrant red color the penile shaft takes on after a particularly vigorous rub-out session.
After the high school dance left Danny hot and bothered, he had no choice but to rub the rhubarb.
#jack off #masterbate #teen angst #rubbing the rhubarb #penis
by Chicago Jeff October 04, 2006
5 Words related to Rub the Rhubarb
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