Article continues below advertisementUFC CEO Dana White recently named Sean "Diddy" Combs as the rudest celebrity he has ever met. During an appearance on "The Katie Miller Podcast," White did not hold back, referring to the disgraced music mogul as "the biggest d------- ever."White explained that his opinion stems from a specific encounter years ago at a charity event hosted by skateboarder Tony Hawk. The event was family-oriented, and White attended with his young niece, who was a Diddy fan at the time.