UFC champ Kamaru Usman says he REALLY wants to punish Colby Covington in the Octagon ... telling TMZ Sports the hatred is real and it's time to beat some respect into him.
Usman says Colby has been trolling him for months -- spitting out some of the most disrespectful insults Kamaru's ever heard. Usman says the guy crossed a line and needs to pay.
"Every opponent that I've faced, I've never really had ill will towards ... I've never had bad blood to where I was in there maliciously trying to hurt them.