420 rub Share definition Flag When one partner masturbates another partner who is intoxicated from marijuana. Or when someone intoxicated on marijuana self masturbates. "Dude i know its December, but how about a 420 rub?" 420 rub by Cory Walter May 14, 2008 0 0 Get merch Get the 420 rub mug. Buy Now — $32.95 See more merch