That ain’t the friggin’ Christmas star, Griz. It’s the light on the sewage treatment plant.
This is it, the grand champion of all Christmas Vacation shirts. One part cigar flame, one part sewer gas and—BAM!— an explosion of flaming Santa sleighs, a little highway sledding, Cousin Eddie's RV, 25,000 imported Italian twinkle lights, a couple of pesky neighbors, and a full sh*tter.
That's what Christmas is all about.