noun. A gas attack of apocalyptic proportions; may be a sign the Rapture is nigh.
Real citation: "YOU ARE ALL DOOMED - NOBODY ESCAPES THE SUICIDE ASS BOMBER! You have been warned - push me one step further and....
welcome to FARTAGEDDON
There can be no survivors"
(April 29, 2004, http://www.viperalley.com/forum/anything-goes/20126-personal-threat-everyone.html)
Made-up citation: "The medical term for your condition is fartageddon. Please leave."