It’s really, really hard to get in the mind of UFC champion Conor McGregor.

He’s the king of trash-talk, and as such is not only aware of every play in the book, he created most of them.

When Floyd Mayweather and Conor McGregor hit the world tour a few weeks back, there was one moment where Floyd won the mental battle.

Floyd borrowed an Irish flag from a McGregor supporter, and draped it over himself on stage. This bothered McGregor to the point that he offered a physical threat to the boxing star.

Well, Floyd’s at it again, this time going so far as to make a custom TMT mouthguard with the Tri-Colored Irish Flag.

Check it out: