noun. A notch below pooageddon, according to the manual.
Related terms: peesaster.
Real citation: "One of the standard euphemisms in my house (17 month old son) is 'poosaster'."
(Bill Mullins, June 6, 2008, American Dialect Society listserv, http://listserv.linguistlist.org/cgi-bin/wa?A2=ind0806A&L=ads-l&P=R5916)
Made-up citation: "I've gone on vacations and benders, but never a rampage. It's on my to-do list, as is never coming within three yards of a poosaster and the surrounding areas."