IT SEEMS like everybody’s lining up to hate on the UFC these days.

First there was Conor McGregor claiming he’d retired because he didn’t want to do the promotional activities the MMA promotion asked of him, then heavyweight Mark Hunt took it to a whole new level — and now a cryptic tweet by Nate Diaz suggests something else is afoot.

The 31-year-old indicated he wasn’t best pleased with the UFC when he took to social media on Thursday morning (AEST).

Nobody’s quite sure what the man from Stockton meant by that. Theories abounded as to whether it had to do with his upcoming rematch with Conor McGregor at UFC 202, how much he was going to get paid for the fight or the fact “The Notorious” interrupted his recent appearance on the late-night US talk show hosted by Conan O’Brien.

Though he’s clearly not happy about something, it doesn’t look like he’s as fired up as Hunt was on a recent edition of The MMA Hour when he discussed the UFC’s handling of Brock Lesnar’s doping saga.

Lesnar beat Hunt at UFC 200, but it has since been revealed he failed two drug tests, both in and out-of-competition, testing positive to the anti-oestrogen agent clomiphene.

“Before the fight I was assuming he was cheating,” Hunt said.

“Look at him. There’s no way that guy makes 265 pounds. That guy is a gimp, he’s sticking needles in his ass like the rest of these cheaters. And the thing about that is, he’s sitting here saying ‘this is a fair place.’ Well, it’s not fair. These guys are cheating and they should be in court for it. (They should) lose all of their money if they’re cheating, because if I die in there, who’s going to look after my family.

“That’s corrupt s***, man. These motherf***ers should be penalised hard. Dirty, scummy, cheating scum. That’s how that monkey won his world title. He didn’t do it by doing it clean. He did it by cheating, just like the rest of these cheaters.”

DIAZ SETTLES BEEF WITH BIEBS

Not everyone likes Justin Bieber.

Be it the music, the hairstyle, the tattoos, or the fact you can’t stand someone who looks like they’re 12-years-old having more money and fame than you ever will — there’s something about the Canadian pop star that doesn’t always sit well with those who aren’t teenage girls.

Hater might be a strong word, but Diaz was one of those who wouldn’t feel like saying “sorry” for offending the 22-year-old.

That much was evident after UFC 196 — following Diaz’s defeat of Conor McGregor — the fighter had a stinging rebuke for the singer. Post-fight, Bieber posted on Instagram that Diaz’s fighting style “is terrible”.

Unsurprisingly, the man who’d just dethroned the biggest name in UFC — bar perhaps Ronda Rousey — wasn’t exactly about to let that one through to the keeper. See for yourself.

But that beef appears to be behind the pair. Diaz revealed the two met recently and put their differences aside when he appeared on Conan O’Brien’s show.

“I was out here in LA and I went to a club, and everybody was coming up to me like, ‘Hey Justin Bieber’s over there in the corner,’ like there was this big fight that was supposed to go down between me and Justin,” Diaz said.

“I was like, ‘It’s alright, leave Justin alone.’

“He had a little crew with him, a bunch of little Biebers, and they came and found me. I had a crew with me too. He said, ‘It’s all good, let’s squash the beef man.’

“I thought, ‘Wow, is that how a beef works out here? It’s all good, I have no problem with you Justin Bieber.’

“He’s cool now.”

CONOR HIJACKS DIAZ’S AIRTIME

While one feud was put to bed on the comedian’s popular program, another got more intense. McGregor hijacked Diaz’s TV appearance with an inflammatory pre-recorded message.

“I just hope he’s not up on that stage wearing that stupid black T-shirt he’s never out of,” McGregor said.

“The boy has been wearing the same damn T-shirt for the past 20 years or something.”

Diaz then unbuttoned his jacket to reveal his trademark black shirt to the audience.

McGregor continued to rile up Diaz, calling him “skinny” and announcing he’d brought in similarly-built fighters to train against in preparation for UFC 202.

“The boy won the lotto last time, he knows it, I know it,” McGregor said. “August 20 (at UFC 202) I get my revenge and I look forward to it.”

Diaz responded to the claims simply: “The truth came out — and it’s coming again. “The truth will be on August 20 when it goes down again.”