UFC's Kamaru Usman Says Conor McGregor Chickened Out of Real Fight Talks

"I've offered him a shot! I said, 'Hey if you want it, it's yours, you got it' and he was silent." That's UFC champ, Kamaru Usman, telling TMZ Sports he TRIED to make a fight with Conor McGregor happen earlier this year ... but the Irishman was all…