The unwritten redneck law that says if you place your alcohol in another redneck's cooler, said redneck has the right to leave without making the other redneck aware of them leaving. The alcohol placed in his cooler then becomes his own.
Jim Tom: "Hey Bubba, where'd Cletes go? My beer was in his cooler"
Bubba: "Cletes went to his trailer, that's his beer now"
Jim Tom: "How's it his beer?"
Bubba: "That's the redneck cooler law fer ya"