The retired, former UFC Middleweight champion, turned Power Slap commentator, joined the 'TMZ Sports' TV show on Wednesday to talk about his new gig ... when we asked Michael, if, for research purposes, he ever doled out a slap.

Turns out, oh yes, he has! Bisping told us the story of the time when competitor Jesse Nutting asked for a slap ... and a slap he got.

"The guy involved, he says to me, 'give me a little slap, Bisping,'" Michael explained, adding, "I did not give him a proper slap, but I gave him just a little mess around. Anyways, he was scheduled for the last slap contest of the day, if you will."

So, Bisping slapped Nutting and went about his business calling the fights.

"We're commentating on the fights and we're waiting for the last one to come out. And, then we're waiting and we're waiting and he doesn't show up. Then the producer comes in and tells me, 'Mike, apparently, the guy that you slapped, afterward, he started feeling all fuzzyheaded and blurry and he said that he can't compete.'"

"'The doctor looked at him and said that he's totally fine.' But, I don't believe this. Controversy follows me wherever I go."

Jesse didn't fight, and Bisping was worried he screwed up the event.

"Dana and all the partners put a lot of money into this. A lot of organization. Our commentator, that idiot Bisping is backstage slapping the fighters and we can't continue. I thought, 'Oh, My God, I'm going to get fired for sure.' Classic me strikes again. I will be slapping nobody. Punching nobody. I'm just going to sit there. Do my job. And, try to be as boring as possible."

We also talked to one of the Power Slap breakout stars, Michael "Slap Jesus" Smith ... about how the former MMA fighter turned into a slap fighter.

"I had my first MMA fight a couple years ago, and I started looking for more fights on Facebook groups and came across a post from one of the producers," Smith said. "I looked it up, seen it was from The Ultimate Fighter people ... and said, 'Let's go!'"

Smith says he loves the slap-fighting experience ... adding, "It's right up my alley!"