The area of residence that an individual will move to temporarily (in mind, not necessarily body) once they have hit the 'erb.
Generally used in conversation once a fellow smoking buddy has got to the point just before he/she cannnot open their eyes anymore and decides to crash in your cupboard and fall asleep with their face buried in a pair of your most pungent trainers, but cannot be bothered to move.
"Ladies and Gentlemen. Thank you for travelling on the Baked Express. We are now entering Stonesville, population - You."