One in adoration or in direct subjugation of the cock. Lover and tickler of the cock, the cockswain is subservient to the penis like a young sailor bound to a ship. Or one with the mental toughness to command a vessel. Used specifically in instances of sheer idiocy or submission.
A big dickedmother fucker that runs a ship or boat crew. He is in charge of every thing on the ship and the surrounding sea. Once on land, he WILL fuck your girl