Stipe Miocic Gives Props to Conor McGregor Victim, 'Got a Chin of Steel!'

Stipe Miocic says the guy Conor McGregor attacked at a pub back in April is one badass dude ... telling TMZ Sports he's got a CHIN OF STEEL!!! The UFC superstar says he's seen our vid of Conor clocking the bar patron for rejecting his whiskey ...…