Floyd Mayweather is reveling in Conor McGregor's downfall ... trolling the UFC star on social media and laughing about the fighter's broken leg.
Floyd took to Instagram on Monday to rub the salt in Conor's wounds ... posting a photoshopped pic that showed a sitting-down McGregor whose foot was turned sideways.
"Y’all got it twisted!" Floyd said, we're sure with pun intended. "I like how his shoes fit. Now, do the stanky leg."
Floyd has been basking in McGregor's loss ever since The Notorious snapped his leg in his match with Dustin Poirier on Saturday night in Vegas .