“I will flatline that curly-headed f*ck boy. That’s pretty much it.”

Stephen R. Sylvanie-USA TODAY SportsEarlier this week, UFC newcomer Ben Askren called out Kamaru Usman on Instagram, calling the top welterweight contender a ‘hypocrite’ and ‘a little b-tch.’

It didn’t take long for Usman to reply, as ‘The Nigerian Nightmare’ promised to ‘flatline’ Askren if the former ONE FC and Bellator welterweight champion keeps running his mouth on social media.

“I’m a realist. I’m the type of person who’s never said never,” Usman stated on Ariel Helwani’s MMA Show (via BJPenn.com) in response to Askren’s remarks. “It is what it is at the end of the day, but let’s be honest, I will flatline that curly-headed f*ck boy. That’s pretty much it. I will flatline him. I will…