ad hominem

US /ˌæd ˈhɑː.mɪ.nəm/
UK /ˌæd ˈhɑː.mɪ.nəm/
"ad hominem" picture
1.

directed against a person rather than against their arguments

:
His argument was dismissed as an ad hominem attack.
The debate devolved into a series of ad hominem insults.
1.

in a way that is directed against a person rather than against their arguments

:
He argued ad hominem, attacking his opponent's character.
It's unfair to respond ad hominem when the issue is about policy.