The 4-C is slang for the
Four Corners. Which is the region of the U.S. including Southeast Utah, Southwest Colorado, Northwest New Mexico, and Northeast Arizona. It derives its name from the
Four Corners Monument, which is the only place in the U.S. where four states come together at one point. Locals from the
Four Corners Area, which includes all four involving states, refer to their home region as the "4-C".