backbiting, catty (informal) cruel, malicious, mean, nasty, rancorous, shrewish, snide, spiteful, venomous, vicious, vindictive, vixenish
charitable, generous, gracious, kindly, magnanimous, nice
English Collins Dictionary - English synonyms & Thesaurus
If someone is being bitchy or is making bitchy remarks, they are saying unkind things about someone.
I'm sorry. I know I was bitchy on the phone...
There's a lot of bitchiness.
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