Oh no! Wrestling legend Hulk Hogan is going NUTS over the release of grainy black-and-white screenshots of his supposed sex tape!!! A single pic allegedly showing the Hulkster in a mounting position was published on TheDirty.com on April 19th, then 3 more pics were released on April 23rd showing a "naked" Hulk in the act with an unidentified female.

Hogan's lawyer just sent a cease and desist letter to TheDirty.com editor Nik Richie, demanding the pics be taken down or face a lawsuit.

The letter stated: "As you know, should a sex tape or photographs of Mr. Bollea exist, they were taken without his consent and therefore the same would constitute a felony in the State of Florida."

According to TMZ, Nik and TheDirty.com website are staying firm in keeping the sex tape flicks up. To be continued...