But the Irishman clearly appears to have the megabucks of an A-list celeb - boasting that he likes to splash the cash on shopping sprees, saying he frequently "drops $27,000" on designer clothes and items when on shopping trips in the States.
In a wide-ranging interview in the latest edition of GQ magazine, the Crumlin fighter also has a go at the Kardashians. McGregor says that he doesn't "give a f**k about them" and adds that Khloé Kardashian has a "big fat ass".
On the subject of his wife expecting their first child, McGregor says he plans to keep his kid out of the limelight and away from the paparazzi. "I'm not trying to bring a kid into that," he says. "If someone comes near me when I have my kid in my hands, like the way they come near me now, looking for pictures, someone's gonna be badly hurt."
Speaking about hurting people, McGregor also talks up the possibility of a match with boxing champ Floyd Mayweather being on the cards. "I'm pursuing that and no one can stop me from pursuing that. If I hit that man, his head is gonna go into the bleachers. You understand that?" he claims.
"“We’re talking about boxing. That’s it. But again, age waits for no man. He’s 40 years of age. He’s a little…he’s got a little head on him. Honestly, my fist is bigger than his head. I sleep people. I put people unconscious. I’m stating facts. If I hit that man, his head is gonna go into the bleachers. You understand that? If I crack that little head of his, it’s gonna go clean off his shoulders and up into the bleachers.”

Surprisingly, McGregor doesn't have a pop at Donald Trump in the interview. When asked for his two cents on the former reality TV star turned Leader of the so-called Free World, McGregor says: “People like to blame others. I think a person should just look at their own situation, look around them, find out what they wish to do, and seek and go and do that. And that’s it. I was in New York when all of that was going down, the protests in New York with the Trump thing. It’s like, ‘Trump, out!’
“When Obama came in, what happened to you? Like, all these fighters: ‘This union is gonna save us!’ What do you mean, it’s gonna save you, exactly? You think just because we get a union set up, you’re gonna become a multi-hundred-millionaire? That’s not the case. You might get a hospital bill paid. I just think it’s a crazy thing to spend energy on. Now, maybe there’s people that get kicked out of their home, you know, things like that and all.
"Rather than putting your energy into pointing the finger at somebody else, figure out what it is you need to do and do it, and do it right, and get it done, and get your situation right."