drag someone's name through the mud
US /dræɡ ˈsʌm.wʌnz neɪm θruː ðə mʌd/
UK /dræɡ ˈsʌm.wʌnz neɪm θruː ðə mʌd/
1.
to say bad things about someone in order to damage their reputation
:
•
His political opponents tried to drag his name through the mud before the election.
•
I won't let anyone drag my family's name through the mud.