The act of performing the dutch rudder in a circle with more than for people. Similar to a circle jerk, only one person grabs their dick and the arm of the next person and moves the other persons arm up and down. This happens in a consecutive line having all members of the ship "rowing" at the same time. At least four people are needed to constitute a dutch slave ship.
Hey dude did you bring Dave? We need a forth to make this a real dutch slave ship, otherwise its just a bunch of dudes dutch ruddering... which would be homo.
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