Hulk Hogan -- I'M SHAVING MY MUSTACHE!!!

It's the most famous mustache in the universe, but Hulk Hogan says he's finally ready to shave off his iconic facial hair -- FOR A MOVIE!!!

Hulk announced his plans to shatter the space-time continuum yesterday in Florida -- telling TMZ, "I'm getting ready to go on some auditions. I'm getting ready to shave my head and my mustache. So that should be scary ..."

Hulk also said he's all better after his dental surgery Tuesday night -- when doctors operated to remove a metal tack from his mouth ... and clean up the surrounding infection. Long story.

Hulk added, "Theme for the day is ... kids, take care of your teeth."