ad hominem

Definitions

1. 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.
   abbreviation, alt-of, ellipsis
2. A personal attack.
   informal

Equivalents

CEFR level