When people are vendictive and a pathological lyer what is the diagnosis?

There is no specific diagnosis for people who are vendictive and pathological liars. However, these behaviors can be symptoms of underlying psychological disorders such as narcissistic personality disorder, antisocial personality disorder, or histrionic personality disorder. In general, however, these symptoms might also signal other disorders involving emotional dysregulation and aggression; substance abuse might also be part of the underlying causes.

It is important to note that only a qualified mental health professional can assess an individual's symptoms and make a diagnosis.