Many of our expressions come from the sea.
Scuttlebutt. Gossip. A scuttlebutt is a water keg.
By and large refers to the set of the sails.
Sailors refer to the toilet as "the head". In the days of sail, the relief station was located at the bow ,or the head of the ship.
Hold a turn. To belay a sheet or halyard.
By the boards. In the early days a ship was steered by boards which hung over the side. Starboard is a contraction of "steer board"
Larboard is the "Lee board". The left side of the ship was the "Port" side, the side that was up against the wharf or pier.
You sometimes hear people say, up against the dock. No, a dock is a body of water between to piers.