The term 'SAILOR's Stir' is a phrase used to describe the job of a BRIG, which is a four-letter word. A BRIG is a two-masted sailing vessel that was used in the 18th and 19th centuries for both military and commercial purposes. The term 'SAILOR's Stir' refers to the activity of the crew on board the BRIG, which involved the constant movement of sails and rigging to adjust the ship's course. This activity was necessary to ensure the safety of the ship and its crew.