bitchiness       
noun [ U ] uk/ˈbɪtʃ.i.nəs/ us/ˈbɪtʃ.i.nəs/
 损害别人的行为,尤指说人坏话
unkind behaviour towards someone, especially by saying unpleasant things about them
  There was a lot of bitchiness between the teenagers. 少年们之间有很多恶趣味。 
 Beware of stereotypes about the alleged bitchiness of female workplaces.  当心所谓女性职场多龃龉的陈见。 
 See: bitchy
 - More examples
 - For all her bitchiness, she is a good friend.
 - She spoke without any trace of bitchiness.
 - I was shocked by his bitchiness.