Hulk Hogan just dropped his $100 million lawsuit against Gawker for leaking his sex tape online ... TMZ has learned.
As we reported, Hulk sued the website last October for posting a minute-long clip of him doing the dirty with the wife of radio personality Bubba the Love Sponge ... a tape that was recorded more than 6 years ago.
It's unclear why Hulk dropped the case -- but according to the court docs, Hulk voluntarily dismissed the lawsuit "without prejudice" ... meaning he can refile if he wishes. As of now, the case is closed.
Hulk also sued Bubba the Love Sponge for unspecified damages -- accusing him of leaking the footage to the media -- but that lawsuit was settled, and Bubba apologized on the air.