McGregor noticed yesterday during the two trash-talking superstars' first conference that his microphone was cut when Mayweather was talking, denying him any chance to challenge claims Showtime was making.
He also hit out at "Money" and the lack of it amid tax fraud allegations with the IRS.
Last night's showdown in Toronto was explosive as McGregor sensationally accepted Mayweather's dare to put his whole fight purse on the line.
And that presents another angle where the build to Mayweather vs. McGregor takes a drastically different and noticeable turn. "He's 40! Dress your age, carrying a school bag on stage". "You sing it for me, you dance for me!". "I want to keep it going and I want to take the opportunities because there's no such thing as the ideal time".
The media tour has continued ahead of their record-breaking bout in Las Vegas on August 26 with both Floyd Mayweather and Conor McGregor trading insults and predictions.More news: Marks & Spencer share price: United Kingdom sales dip in Q1
Yup, Mr McGregor was having a go at his opponent Floyd in Toronto - the location for the second leg of their world promotional tour (they had earlier kicked-off in LA).
When asked if anything got to him, the 40-year-old added: 'A lot of people say that Conor McGregor is racist but I'm not anxious about that.
Taking on promoters Showtime, who cut off his mic in Los Angeles: "Look at this little weasel, I can see it in your eyes". They'll do that then pack up their bags and jump on private jets to the next stop because there's more rock n' roll to be played and that's what Mick and Keith do.More news: Facebook, Google, Netflix take part in United States net neutrality 'day of action'
At one point he grabbed an Irish flag from the crowd and posed in front of McGregor.
Courtesy of a knockout of Eddie Alvarez in the main event of UFC 205 at "The World's Most Famous Arena", the 5-foot-9, 155-pound McGregor added the UFC lightweight championship to his resume, going along with the featherweight title he won in December of 2015.
The undefeated American joked to TMZ: 'We all know there's only two types of boys - a white boy and a cowboy - and I'm neither'.More news: China: US Has Apologized for 'Republic of China' Error