Utility Closet means: The utility closet (or “U.C.”) is the location of the fuse box, water heater and power source. The utility closet, or “U.C.” as it’s commonly called, is where you will find the water heater and fuse box for your house on Frindel Lane. These are often used as nighttime hangouts and for areas to blaze session involving pot in various forms such as a bowl, joint or spliff. (in Community Dictionary, added by Garrett Barnett)