sling mud at

sling mud at (one)

To disparage one; to attempt to mar one's reputation. I'm trying to maintain a fair and respectable campaign, and my opponent has no problem slinging mud at me.See also: mud, sling

sling mud at

Insult or discredit someone, as in The paper became famous for slinging mud at movie stars. This term replaced throw mud at, which dates from the second half of the 1700s. See also: mud, sling