argumentum ad hominem

/ Latin (ˌɑːɡjʊˈmɛntʊm æd ˈhɒmɪˌnɛm) /

noun logic

fallacious argument that attacks not an opponent's beliefs but his motives or character
argument that shows an opponent's statement to be inconsistent with his other beliefs
an instance of either of these

Word Origin for argumentum ad hominem

literally: argument to the person

Words nearby argumentum ad hominem