noun. Ass, folks. Here be ass.
Real citation: "Paddle the buttockage good. Oh yeah."
(That Quiz Guy, "Old Rites, Almost Forgotten," June 7, 2006, http://thequizblogger.blogspot.com/2006/06/old-rites-almost-forgotten.html)
Made-up citation: "Though I often fret about the horrid state of other parts of my body, I hardly ever worry about my buttockage. It would be cool if my non-buttockage were out of sight too."