'Come and get me': McGregor's gangster taunt

Conor McGregor has added fuel to the fire of a reported gangster feud by yelling "come and get me" after leaving an Irish court.

The UFC superstar pleaded guilty to speeding and copped a 400-euro ($A629) fine before leaving the Dublin court on Thursday where he was asked about the alleged feud.

Reports suggest the trash-talking Irishman punched three men in a pub in Crumlin, south Dublin, including the father of the gang's dangerous crime lieutenant Graham ‘The Wig’ Whelan.

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Some of the wilder reports, which are unverified, stated that McGregor now has a price on his head, if he doesn't pay restitution of AU$1.4m to Whelan.

McGregor brushed off speculation he fled Ireland for the Spanish island Lanzarote and seemed unfazed by reports he has a target on his head.

"It's all bollocks," McGregor said.

"I thought I was in bleedin' Lanzarote?"

The Irishman hopped into a car but managed to stoke the fires a little more before driving off by issuing a challenge to anyone potentially threatening his wellbeing.

"Come and get me. Come and get me," McGregor taunted before driving off in the car.

McGregor's father Tony, speaking to the Irish Mirror, also rubbished claims that his son was now in the crosshairs of gangsters.

"I'd view 95 per cent of that story as nonsense and the other five per cent is overly exaggerated. And that's it,” McGregor Snr said.

"That's all nonsense, that is. Absolute nonsense. It's an absolute nonsense story," he said.

"It's grown legs and it's getting that ridiculous – it's become funny. We have nothing to fear here whatsoever. There's no one after us for anything.

"We're a law-abiding family and we've stayed a law-abiding family."

The latest development comes a day after a highly regarded Irish crime journalist warned that McGregor's life was potentially in "very serious danger" after his run-in with the infamous drug cartel.

Speaking on Newstalk Radio, Paul Williams said the gang, called the Kinahans, "do not care who Conor McGregor is", and will "drag him down into the cesspit".

"He has come into conflict through probably no fault of his own, with a group of very, very dangerous people who are tied up with the Kinahans," Williams told Newstalk Radio.

"These people do not care who Conor McGregor is, what he stands for, how powerful he is, they will drag him down into the cesspit.

"I would say, in the next 48 hours, if he still in the country - and I understand that he may have left the country - but if he is still in the country, I understand from my sources that the Garda (Irish police) will be approaching him to give him a GIM form, which is a Garda Information Message, to tell him that there may be threats to his safety.

"This is a huge story, and imagine what it would do to our reputation if this national sporting icon is attacked by a bunch of gangsters.

"Conor McGregor is potentially in very, very serious danger, I hear that from my sources and from looking at the lay of the land.

“He has ended up crossing swords - accidentally or however - with some very, very heavy people, or some people who are related to some very, very heavy people who could pose a very serious threat to his safety, and potentially his life. And I don’t say that lightly.

“And these people, you have to remember – as I keep saying – they don’t care, they don’t have parameters, they don’t have boundaries, they don’t discriminate between whether you’re an international sporting icon or just a man on the street. They shoot you, they injure you, they do whatever they want to do.

“I think it’s extraordinary. And I think in the next 24-48 hours, I believe that An Garda Síochána (Irish police force) will be approaching Conor McGregor and saying to him, ‘By the way, we just want to officially inform you that potentially your safety is at risk’.

“I think it’s an extraordinary state of affairs. And watch this space.”

McGregor appeared to confirm the reports of a bar brawl after the Irish Daily Star published a front page article about the incident.

In a response to the headline, 'Top Celeb Punched Mobster's Dad', McGregor uploaded a video to Instagram entitled, "the celebrity".