Conor McGregor just UNLOADED on Eddie Alvarez at the UFC 205 press conference at Madison Square Garden ... telling Alvarez to "suck these big Irish balls."
It was insane ... Conor walked onstage 15 minutes late rockin' a mink coat ... and proceeded to verbally attack Alvarez.
At one point, McGregor snatched Alvarez's belt off the table ... almost coming to blows before Dana stepped in.
If the presser's any indication of how the fight's gonna go down ... there's gonna be fireworks Saturday night at MSG.
Waiting for your permission to load the comments.