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1.
The state or condition of being an asshat. Having the collective qualitites or characters of an asshat.
"His antics were a perfect example of asshatery"
by Jeff G. September 17, 2004
 
2.
-the act of weaeing your ass as a hat

-being a dumbass

-performing fucked up stunts that the cast of jackass wouldn't even do
bicycle jousting, ass-hatery at its finest
by meteu April 21, 2009
 
3.
A state created by an asshat. Used grammatically in the way you would use "disarray".
Joe: Hey, did you have that one guy fix your car?

Jane: Yeah, now its full of asshatery.
by coolkidiscool August 27, 2009