An embellishment of a Dutch rudder: the act of a man holding his own penis wrapped in a warm wash cloth while another person pulls up and down on his forearm(s), creating a masturbatory experience. Can also be used with the double Dutch rudder. The 'Caribbean' comes from the warmth of the wash cloth, the 'rudder' from the original Dutch rudder. Apparently, with two men, neither is gay when forearm manipulation is solely employed.
"I was just trying to clean up a bit, but all of a sudden it turned into a Caribbean rudder and my arm wasn't even tired!"