ad hominem

Of or relating to this kind of fallacious objection.

In an ad hominem manner.

(informal, nonstandard) A personal attack.

Ellipsis of argumentum ad hominem: A fallacious objection to an argument or factual claim by appealing to a characteristic or belief of the person making the argument or claim, rather than by addressing the substance of the argument or producing evidence against the claim; an attempt to argue against an opponent's idea by discrediting the opponent themselves.