Definition of "bitchery"

Again, Sometime Soon, the evening's opener, has a barbed comic style that recalls the bitcheries of The Boys in the Band […] .

1988 February 5, Albert Williams, “Slowdance in Room 8-C/Again, Sometime Soon”, in Chicago Reader‎

He had been a noise, a recurrent clatter of bitchery and ambition, a kind of monster of the Union and the MCR, throughout Nick's years in college.

2004, Alan Hollinghurst, chapter 3, in The Line of Beauty […], 1st US edition, New York, N.Y.: Bloomsbury Publishing

[…] nonprofessional actresses of a certain age enact playlets on the themes of conspicuous consumption, marital tension, and motiveless bitchery.

2010 October 21, Troy Patterson, “The Real Housewives of Beverly Hills”, in Slate