UFC president and CEO Dana White has named the celebrity he considers the “biggest douchebag ever.” During a recent episode of The Katie Miller podcast, White, a former amateur boxer and boxing coach , was asked which celebrity he’s had the worst interaction with. “Oh, Diddy — 100 percent the biggest douchebag ever,” the 56-year-old responded, recalling a meeting with the disgraced hip-hop mogul , real name Sean Combs, at a charity event. “Tony Hawk used to have these charity events, and when my kids were little, you’d go to these charity events and, like, lots of celebrities would be there. So everybody would do things for each other’s kids,” White said. The longtime friend and ally of President Donald Trump attended the fundraiser with his young niece, who, at the time, was a fan of Combs’s music . Dana White identified Sean 'Diddy' Combs as 'the biggest douchebag ever' (Getty) When Combs arrived, White remembered encouraging his eager niece to approach the music mogul to ask for a picture.…