Nate Diaz chose the fifth anniversary of his famous win over Conor McGregor to lash out at the Irishman.
Diaz choked out McGregor in the second round of their first meeting in 2016 after stepping up at short notice to replace the injured Rafael dos Anjos.
McGregor then demanded – and was granted – a rematch which he edged on points five months later.
He went on to become a two-weight world champion and fight Floyd Mayweather while Diaz’s career has failed to take off since.
And after McGregor acknowledged the anniversary of his first defeat in the UFC by saying, “Done it all, still here”, Diaz’s response suggests he is still bitter about how their rivalry played out.
“I f***** you up and u never got it back but u acted like u did now u get a rematch every time u get your ass beat like a spoiled little b**** would,” he said, alluding to the fact McGregor was granted a rematch but he was not given a chance to win a rubber match.
McGregor is also set to be given the chance to avenge his recent defeat by Dustin Poirier when the rivals meet for a third time this summer.
And Diaz added: “I’ve done it all and I’m still here plus the guy who just beat ur ass is a scared Lil b***** also f*** u both.”
Diaz has also called out Poirier for a fight at welterweight but the UFC has on interest in matching the former interim champion at 170lb.
That leaves Diaz sitting on the sidelines as UFC president Dana White plots an unofficial 155lb tournament with the top nine in the world, including McGregor and Poirier.
The belt is still held by Khabib Nurmagomedov despite him announcing his retirement following his win over Justin Gaethje last October.
White will hold further talks with his champion this weekend but insists he will not strip the Dagestani of his title.
“We’re going to have dinner on Saturday or Sunday and just talk and see,” he said.
“I think a lot of these fights have to play out in that division. From No. 9 all the way up to No. 1, they’re incredible fights. You can mix or match them any way you want and they’re really good fights.
“Let some of these play out to see who will fight next for the title. I think if Khabib is interested, he’ll take the fight.
“You don’t see Khabib saying, ‘Leave me alone. Stop asking me.’ So there’s still a chance. That’s the way I look at it.”