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Lesnar went on a furious rant when he was interviewed by Joe Rogan and continued to slam Frank Mir after beating him to defend his UFC heavyweight title.
The Mandalay Bay crowd jeered during the interview with Lesnar who shouted: "I love it, keep going, keep going. I love it, man!"
The WWE superstar turned MMA beast was then asked why he confronted Mir following the stoppage in the second round.
"Frank Mir had a horseshoe up his ass," he explained. "I told him that a year ago, I pulled that sum-b**ch out and beat him over the head with it!"
A chorus of boos continued to drown out Lesnar's interview, but he reveled in the moment as he exclaimed: "I love it, I love it. I'm gonna go home tonight, I'mma sit down with my friends and family.
"I'm going to be drinking Coors light. That's right Coors because Bud Light wont pay me anything.
"And hell I might even get on top of my wife tonight. See y'all later."
He avenged his first professional loss in a crowning and controversial moment, but he cut a humble figure during the post-fight press conference where he apologised for his actions.
"Frank Mir came prepared," he said. "It was an honor to be here at UFC 100.
"Good people pay there hard earned money to see a fight so I just throw a little salt and pepper to make it better.
"I am truly sorry for the way I acted. It was an embarrassment.
"I'm not to picky with beer, people, I'll drink anything. Tonight I'm going to be drinking bud light.
"Frank Mir is a great fighter. The only thing i truly had against him was he beat me.
"I'm a sore loser, so when I won tonight I just let my emotions get the better of me.
"I came from a entertainment business. People want to know what I could bring from the WWE - well you just saw it."
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