UFC

Ronda Rousey just shared some very interesting advice she got from her mom -- "Winning is a bitch. But revenge is a motherf*****."

Ronda was speaking at the Women in Action female empowerment event in Chicago earlier Friday -- when she talked about advice she got from her athlete mom about bouncing back after a loss.

The crowd went wild for Rousey -- who was pretty pumped up!

Does this mean she wants another crack at Holly Holm?

She also said, "I want to win my belt back."

Alistair Overeem is so confident he'll destroy Stipe Miocic at UFC 203 -- he's calling his round!!!

Overeem was out in Vegas recently when we asked about his big title fight with the UFC heavyweight champ in September ... a fight in which Alistair will be gunning for his 5th straight victory.

You can tell his confidence is through the roof.

Dana White confirms to TMZ Sports ... he WILL be speaking at the Republican National Convention next week to talk about his relationship with Donald Trump.

The UFC honcho has been very vocal about his support for Trump -- and previously appeared on the "TMZ Sports" TV show on FS1 and explained why he's got Donald's back no matter what.

As for White's RNC speech -- Dana says it won't be political ... but rather, "It will be about my relationship with Trump and the Trump that I know."

Forget Luke Rockhold, Michael Bisping had ANOTHER challenger waiting for him when he got home Wednesday night -- his 15-year-old son ... who threw down with dad right in the middle of their house.

Turns out, Callum Bisping is a high school wrestler -- a pretty good one -- and he tried to test his skills against the UFC middleweight champ.

Check out the clip ... not bad for a 15-year-old. Even Michael admits his days as the alpha male in the house are numbered.

Here's UFC ex-champs Holly Holm and Miesha Tate going full thespian in a scene from their new movie ... and TMZ Sports is the only place you can see them in action ... for now.

Tate and Holm are starring together in an upcoming film called "Fight Valley" dropping later this year, and we got a sneak peek at an intense scene between the two bantamweight beauties.

Check out the clip -- there's some pretty tough talk between the ladies (who actually fought not too long ago) and if you pay close attention you can see a quick shot of new UFC star Cris Cyborg.

Self-help guru Tony Robbins is promising a triumphant return for disgraced UFC star Jon Jones ... saying he knows Bones will come back good as new ... 'cause he's a client.

TMZ Sports got the star of the new documentary "I Am Not Your Guru" out in NYC and asked him about the state of Jones' career after a failed drug test prompted his removal from the card at UFC 200.

Jones is now facing a potentially lengthy suspension from USADA, and the whole MMA world wants to know ... can his career recover?

Robbie Lawler says his next opponent, Tyron Woodley, can worry about getting into hair and makeup -- but he's more focused on beating his ass in the Octagon.

Dana White is revealing why the $4 billion sale of the UFC isn't just great for his bottom line -- it's awesome for the fighters who also want to be Hollywood A-listers.

The UFC Prez came on "TMZ Live" Monday to break down the blockbuster deal with talent agency WME/IMG. Clearly, Dana made a tremendous business deal -- the league was originally purchased for a mere $2 million -- but he says UFC fighters will also reap huge benefits since WME/IMG is so powerful in movies and television.

Translation: Ronda Rousey's just the first of many crossover stars to come.

Jon Jones did not violate his court-ordered probation when he tested positive for a UFC banned substance ... TMZ Sports has learned.

A rep for the Bernalillo County DA's Office says the Corrections Department (who oversees Jones' probation) has decided not to pursue a violation because his sample wasn't collected by them or the court.

We're also told Jones' test didn't come back positive for any substances "that would typically constitute a violation of supervised probation."

The blockbuster sale of the UFC has heavyweight Mark Hunt seeing green -- while his loss to Brock Lesnar has him thinking rematch and hinting Brock might have cheated.

The UFC has been sold ... TMZ Sports has confirmed ... and the sale price is around $4 billion.

UFC sources told us entertainment and sports talent agency WME/IMG will be the new owners. The company head, Ari Emanuel, will wield a lot of power over the organization.

We're told Dana White will still have a major presence, serving as President. The Fertittas brothers will have a minority interest and a diminished role.

Lorenzo Fertitta will be stepping down as CEO.

Although the deal has been agreed upon, we're told the deal will take 6 weeks to 2 months for final signatures.

Miesha Tate was clearly feeling the pain at her Vegas afterparty, after losing her title by submission to Amanda Nunes at UFC 200.

You could tell Miesha's nose was broke as she talked to the cheering crowd at 1 AM at Sapphire Strip Club.

Shaq has mad respect for Mark Hunt in UFC 200, but he's goin' with Brock Lesnar because of sheer girth.

Shaq was classic Shaq Friday when he gave us his predictions, and told us about the symbiotic relationship he has with super big guys.

He feels real bad about Jon Jones, who seems like a lost soul.

Former UFC champ Luke Rockhold is the latest fighter to say ... a big percentage of his colleagues secretly use steroids.

Vegas partygoers, rejoice! 'Cause just hours after replacing Jon Jones at UFC 200, Anderson Silva has also agreed to take over Jones' post-fight party-hosting duties.

Chris Weidman and Carlos Condit are the HOTTEST fighters in the UFC ... according to 2 of the UFC's smokin' hot Octagon girls.

We talked to Chrissy Blair and Vanessa Hanson earlier this week in Vegas ... and asked them all the burning questions ... who's hottest, who has the best body, and dating fighters.

Hottest? Weidman. Best body? Luke Rockhold.

We also get into UFC guys sliding into their DMs ... even though dating fighters is "looked down upon."

But the best part? Chrissy and Vanessa give their BRUTALLY HONEST opinion on Brock Lesnar ... hot or not?

We caught up with Luke shortly after ... he was clearly flattered!

Check out the clips!