Yes, that is a term of science.
“While narcissists are common, malignant narcissists are less common. A notable difference between the two is the feature of sadism, or the gratuitous enjoyment of the pain of others. A narcissist will deliberately damage other people in pursuit of their own selfish desires, but may regret and will in some circumstances show remorse for doing so, while a malignant narcissist will harm others and enjoy doing so, showing little empathy or regret for the damage they have caused” (Wikipedia).
Remember the insults to women, the rapacious attitude toward business deals, the putdowns of the disabled, the gratuitous baiting of his Republican primary opponents.
And draw your own conclusions.
We’re all receiving a daily education in psychopathology and antisocial behavior. Not that that is what we plan while reading a newspaper or newsfeed, but it’s what we’re getting whether we want it or not.