If you accuse someone of muckraking, you are criticizing them for finding and spreading unpleasant or embarrassing information about someone, especially a public figure.
[disapproval]
The senator accused opposition leaders of muckraking.
Examples of 'muckraking' in a sentence
muckraking
Clearly, there's to be no muckraking here.
Times, Sunday Times (2010)
She's talking about the media muckraking, about the price she thinks she paid.
Times, Sunday Times (2006)
Defensive at the charge of muckraking, the press homed in on the security implications of the affair.