CONOR MCGREGOR has renewed his war of words with UFC welterweight champion Belal Muhammad with a vicious social media threat.
The pair have traded verbal jabs on social media over the years, with McGregor igniting their feud back in November 2021.
Muhammad found himself on the receiving end of an X-rated rant from the former two-division champ late last month and responded by mocking the Irishman over his octagon hiatus.
And he felt McGregor's wrath again last Sunday in a since-deleted tweet as he went back and forth with UFC men's featherweight champ Ilia Topuria.
He wrote on X: "I'd love to crush my left hook into Belal's temple and take down the triple crown.
"I'd do it easily. And fast! I'd cave his skull heavy."
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Palestinian-born American Muhammad became the king of the welterweights in July with a dominant five-round display over Brit Leon Edwards in Manchester.
His dethroning of Edwards capped off an incredible run, in which he knocked off former title challengers Stephen Thompson and Gilbert Burns as well as highly-touted prospect Sean Brady.
But McGregor has been less than impressed by the 36-year-old's body of work in his run to welterweight gold.
He continued: "To think this bum is now a UFC champion with zero knockdowns on his resume whatsoever is so bad.
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"The UFC's most abysmal zero revenue generating fighter in modern history."
McGregor, 36, hasn't set foot inside the octagon since breaking his left leg in his trilogy fight with Dustin Poirier in July 2021.
The Dubliner was supposed to make his cage comeback against Michael Chandler in June but was forced out of their long-overdue clash with a broken left pinky toe.
McGregor revealed to SunSport that he was eyeing a December return, although the UFC brass have pushed the rescheduled return of the Mac into 2025.
And he claimed last weekend that he's on course to return to the cage on February 1.
When quizzed about his cage comeback, he told MMA reporter Donagh Corby: "February 1, Saudi Arabia. Dan Hooker."