mud·sling·ing 
/ˈmʌdˌslɪŋɪŋ/ noun
/ˈmʌdˌslɪŋɪŋ/ noun [noncount] : the act or practice of publicly saying false or bad things about someone (such as a political opponent) in order to harm that person's reputation
▪ a campaign marred by mudslinging on both sides
▪ a campaign marred by mudslinging on both sides
— mud·sling·er /ˈmʌdˌslɪŋɚ/ noun, plural mud·sling·ers [count]
▪ a political mudslinger
/ˈmʌdˌslɪŋɚ/ noun, plural mud·sling·ers [count] ▪ a political mudslinger
