A most disrespectful way to tell one to drop the bullshit. An asshat is one who uses their own ass as a hat, making asshatery the action the obnoxious actions made by an asshat, which usually involve angering or disregarding other people.
Kelly- Jessica must be stopped she's an asshat
Joie- Jessica STOP THIS ASSHATERY thank you
Jessica- That hurts
Joie- I'm sorry you feel that way