Constrictor rings, are circumferential indentations in a long turd, created by taking pauses, tightening your sphincter, and then continuing with your business
After eating the whole brisket, I left constrictor rings in my big foot sized bowel movement.
Circumferential indentations left when you make a turd so long that you have to take some pauses, tighten your sphincter, and then finish the job.
After eating that whole brisket, I took a Bigfoot sized turd that had constrictor rings.