The Shark star, 68, claims an anonymous user going by the name Abe List, with the handle @abelisted, has been slamming the actor online for months, but Woods had enough after the person alleged he was a drug user.

The tweet in question was posted on 15 July (15), in response to a message Woods had uploaded about media priorities.

The reply from List, also addressed to conservative political commentator Ben Shapiro, read: "@RealJamesWoods @benshapiro cocaine addict James Woods still sniffing and spouting."

The Twitter profile for @abelisted has since been shut down, but they had reportedly racked up 2,274 followers before the account was deactivated.

Woods filed suit in Los Angeles Superior Court on Wednesday (29Jul15), claiming List "stepped over the line" with the cocaine tweet, which could have been read by all of his thousands of followers, too.

His attorneys add, "(Woods) is not now, nor has ever been, a cocaine addict, and AL had no reason to believe otherwise, Rather AL's outrageous claim is the culmination of a malicious on-line campaign by AL to discredit and damage Woods' reputation, a campaign which began as early as December 2014."

List had previously blasted the conservative star for a comment he made about U.S. President Barack Obama, to which the user responded, "@RealJamesWoods you are a ridiculous scum clown-boy James, a joke."

Woods, who boasts more than 238,900 followers on Twitter, is demanding damages for the knock to his reputation.