Conor McGregor wore a custom suit to the Mayweather press conference with a vulgar message sewn into

An artful trash-talker, McGregor wasted little time tearing into Mayweather's clothes and troubles with the tax man. McGregor was dressed for the occasion, wearing a custom-made suit, and quickly chided Mayweather for his lackluster appearance saying, "He's in a f---ing track suit. He can't even afford a suit anymore."

The crowd laughed.

As Conor went on, he highlighted his own suit.

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"How's this suit look? It's a cracker," McGregor said. "An August-McGregor line, I've got my own line of suits coming out. If you zoom in on the pinstripe it says "F--- you."

Again the crowd laughed, for the line really felt like a joke.

You can watch the segment below.

But as we would quickly find out, McGregor was deadly serious.

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