noun. A number-two-fest that is heinous, calamitous, disastrous, world-ending, and grody.
Real citation: “Simon's twin is a fellow blogger who writes about the exploits of his own twins, and pooageddon was his word for a particularly explosive outbreak of diarrhoea. Tom has had diarrhoea today. I won't write too much about it - its so horrible for him.”
(June 2, 2005, Carer’s Blog, http://suescaringdiary.blogspot.com/2005/06/pooageddon.html)
Made-up citation: “As a summer camp counselor for disabled children, I lived through six poopschlops, three pooageddons, and one pooapalooza of Biblical proportions.”