slang Extremely drunk. Most likely derived from nautical terminology, in which a "sheet" is the rope that controls the sails of a tall ship; if several sheets are loose or mishandled, the boat's movement becomes unsteady and difficult to control, like that of a drunk person. On his 21st birthday, Jeff's friends took him to every bar in town until he was two sheets to the wind. We were all two sheets to the wind coming out of the restaurant, so I knew it wasn't a good idea for anyone to drive.