UFC president Dana White assured people Saturday night that heavyweight champion Brock Lesnar’s post-victory comments were not representative of the kind of person he is.

"If he were a dick, I would tell you he’s a dick," White said at the news conference following Lesnar’s dominant knockout victory over Frank Mir in the main event of UFC 100. "But that’s not who he is."

After solidifying his claim as the undisputed heavyweight title-holder, Lesnar, who has yet to endear himself to the average fan since joining the UFC last year despite a 3-1 record in the Octagon, responded to boos from the crowd in kind.

"Keep booing me, I love it," Lesnar said.

But he went further than that, making a few classless comments and acting in a manner that drew the ire of the UFC’s boss.

Lesnar, who as part of some ongoing pre-fight trash talk with his opponent, had said Mir got lucky the first time the two met. The referee halted their UFC 81 bout in February 2008 at a point when he felt he was in a dominant position. Lesnar also he also believed he made a mistake that allowed the veteran to apply a submisison on him. Lesnar carried on the sentiment in his post-win interview in the Octagon.

"Frank had a horseshoe up his ass," Lesnar said. "And I took it out and beat him on the head with it."

He probably also angered Bud Light, one of the UFC’s chief sponsors, when he said he planned to go home and "drink Coors Light" because Bud Light's not paying him.

It was pretty clear that Lesnar received a stern lecture from White backstage, with whom he is quite close, following the bout.

"I want to apologize, I acted very unprofessionally," Lesnar said in response to the first question he took, which not surprisingly was about his behaviour. "I’m a sore loser; I don’t like to get beat and I believe that (in our first meeting) I gave that fight to him. So there was a lot of emotion in that fight for me.

"I’ve been a fighter my whole life. I went in the entertainment business for a while (with the WWE) and I guess there’s still a little bit of that left in me."

The sincerely-delivered apology didn’t stop Lesnar from continuing in a jovial manner, making light of his errors in judgment.

"I apologize to Bud Light. I’m not biased; I’ll drink any beer," Lesnar said. "But tonight I'll be drinking Bud Light all night."

White said he told his new star that the UFC isn’t about being someone you’re not in order to hype a fight or an event.

Lesnar has a reputation for being volatile with the media, especially if he gets a question he doesn’t want to talk about -- he has abruptly ended interviews before when certain subjects, such as steroids were raised. But he kept his composure during the news conference -- until he had to leave to fulfill another media commitment.

His abrasive attitude is a stark contrast to the other man who successfully defend his belt on the night. Welterweight title-holder Georges St. Pierre sat on the other side of the podium, which was occupied by White as is custom.

St. Pierre, who came in dressed in a suit as he is known to do, revealed that he tore a muscle in his groin in the third round. That didn’t stop the champion, who has suffered the injury before, from staying aggressive throughout five rounds of action for which all three judges deemed he won.

"It’s pretty bad," said St. Pierre, who explained that he heard his abductor muscle snap when he was on the bottom in his guard. "I’m in real bad pain."

St. Pierre said the fact that the fight was moved up in the card played a role in the injury, since he didn’t have as much time as he expected to warm up. But he didn’t lay blame elsewhere.

"It’s my mistake too, I’m a professional, I’m a world champion, I should have been ready for something like that," St. Pierre said.

White admitted the one-sided five-round dispatching of a very dangerous Thiago Alves pretty much leaves things up in the air as to who St. Pierre, who said he isn’t sure for how long the injury might sideline him, will fight next.

"He’s now in the mix for best pound-for-pound fighter," White said.

As far as Lesnar is concerned, White would like to see a matchup with Russian heavyweight Fedor Emelianenko, whom they would like to sign once his contractual obligations with Affliction are completed.