1. A shit so massive it leaves you wondering if you have just had an anal prolapse.

2. When one's defecation is of Biblical Proportions.
John: "Damn, Derek's 'Cayan Chili Macaroni and Cheese' concoction just gave me a Colonic Apocalypse..."

Mike: "Should I call 911?"
by Ender Castigan February 24, 2008
Get the Colonic Apocalypse mug.