It is what the locals call it. So it just may be a local thing!
Just wanted a day "at home" but it turned into travel prep. Had to start refilling the "travel kit," get a new prescription before the upcoming trip, pick up a set of Italian CDs from the library (before this fall's trip), get new license plate tabs for the old truck, remove the San Francisco Muni app from the phone and install new Paris apps... and I've only scratched the surface.