The Notorious is less than 30 days away from his eagerly-anticipated comeback fight against Michael Chandler at UFC 303 in Las Vegas.
But the former two-division champion raised concerns late last month by attending a wild party at his Black Forge Inn pub in Dublin.
McGregor, 35, was said to be out until 2AM on that wild night, which he seemingly replicated on Friday.
The Irishman once again shared footage of himself dancing the night away at his boozer with his 45 million Instagram followers.
In one of the clips, he could be heard encouraging punters to have a tipple of his Proper Twelve whiskey.
And in another, the UFC icon could be seen dancing in front of his glamorous Forged Irish Stout workers – who also looked like they were enjoying the knees-up.
Footage of McGregor’s latest party spread like wildfire on social media and sparked fresh concerns from MMA fans.
One wrote on X: “Bro doing this a little too close to his fight.”
Another said: “So the diet starts Monday, right?”
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And another said: “Chandler is going to win.”
One remarked: “Really not a good sign.”
Another chimed in: “He’s working on the excuses in advance. 4D chess.”
It’s worth noting that on both his recent nights out, McGregor wasn’t actually seen drinking any alcohol.
The UFC’s poster boy is currently on a self-imposed booze ban ahead of his return and insists he can switch off his desire to have a drink in an instant.
He recently told The Mac Life: “I’ve had a fair few drinks in my time.
“So I can abstain from it wholeheartedly and say, ‘Yeah, it’s time to train hard and dial in.’
“I’m happy out, I’m in a great spot, not a bother on me. I’ve had a flick of a switch. I’ve always had a flick of a switch.”
Inside McGregor’s Notorious lifestyle
With more sides to his personality than an Octagon, Conor McGregor’s rise has been an enthralling watch.
McGregor’s showdown with Chandler will be his first outing since breaking his left leg in his trilogy fight with Dustin Poirier nearly three years ago.
But he insists he’ll have no reservations about throwing his once-shattered shin at the forehead of his rival Ultimate Fighter 31 coach.
In a recent interview with James Corden, he said: “I am Terminator now.
“I have a titanium rod that goes into the knee and down to the bone, right down to my ankle.
“It’s unbreakable.
“I wish for and I will work on landing this kick – with this steel bar in my leg – against an opponent and getting them out of there.”