noun. 1. A jackass' attitude. 2. A state of extreme jackassishness.
Real citation: "As far as Boeing, it does dishearten me to hear a crowd boo their own home team after a bad loss, or a string of successive losses (then again, most people present at the games show some kind of jackassitude or another so I shouldn't be surprised)."
(Ufez Jones, SportsFilter, June 20, 2003, http://www.sportsfilter.com/comments.cfm/1762)
Made-up citation: "I was trying to enjoy the pulchritude, but the jackassitude was too much of a bummer."