Supreme Court Justice Clarence Thomas let it all hang out after a long lunch Thursday near Capitol Hill.
Our photog got the Justice on his way out of The Capital Grille at around 3:15 PM. We're told he dined in a private back room with a group of guys.
You gotta see the video ... Thomas is in hysterics for most of it, asking why our guy would "photobomb" him. After our photog ID's himself as a TMZ cameraman, the Justice says, "I know you. I'm just giving you a hard time"
One thing was definitely off limits ... what was on the lunch menu.