• mud slinging campaign, attempt to destroy someone's reputation, malicious defamation
a smear campaign is an attempt made by a group of people over a period of time to damage the reputation of someone or something by starting unpleasant rumours and telling untrue stories about them.
a smear campaign is an attempt made by a group of people over a period of time to damage the reputation of someone or something by starting unpleasant rumours and telling untrue stories about them.