Radio presenter James Ware, 23, launched a McMarathon, a decadent quest to try a different meal at 46 venues in the capital, and filmed his progress.
In his video on YouTube , James describes that he woke up in the morning feeling hungry enough to eat a horse.
He then went on to eat at every single McDonald's in London.
Speaking to getwestlondon , James said: “Like all the best ideas it was pub planned. I had heard about people who challenge themselves to visit every Tube station in London in one day and came up with the fast food twist to make it like a Super Size Me on fast forward.
“I took on the challenge because I was ravenous and wanted to see if it was possible as well as see areas of the city I’d never visited despite being a lifetime Londoner.”
The video shows him selecting each meal as he goes, polishing off bite after bite of fast food, with the McCount telling viewers his score.
James rushed through many of the McDonald's stores before 10.30am in an effort to cram in as many breakfast food items as possible.
James continued: “The challenge was a lot more demanding than I had anticipated, more of a McIronman than a McMarathon in the end.
“I did enjoy getting out and about to areas of London I'd never been to but other than that it was mostly pure pain.”
'The McHangover the next day was brutal'
While the video has proved hugely popular, James said he regretted his monumental effort the next day, thanks to his 'McHangover'.
“After I completed the challenge I felt like my stomach had been on a 10-loop roller coaster and then deep fat fried” James said.
“The McHangover the next day was brutal and I was immobilised although thankfully I’ve bounced back to fight another day.”
James has challenged others to try and complete his time of 17 hours and nine minutes, but says it's no cakewalk.
He concluded: “I would recommend everybody to undertake a McMarathon to see if anybody can beat my time although would advise intensive training, booking the next day off work and trousers six sizes too big.
With just under 70,000 views in a day, the video has proved to be a hit , with many watching his daring effort.
This isn't the first viral video James Ware has filmed, as he previously 'crashed' the Spectre world premiere and after party last year.