Out-of-town travel for the primary purpose of visiting an automotive salvage yard on multiple consecutive days. Usually refers to self-serve or pick-a-part junkyards, where customer labor is required to procure purchases. On a typical junk-cation, you'll drive to the city with the awesome junkyard, spend the whole day pulling parts, crash at a motel, then come back the next day and do it again.

When you eat dirt for the first time and leave your family to build a shack in the woods