Yoel Romero calls into Michael Bisping's show after heated Twitter exchange

The rivalry between Yoel Romero and UFC middleweight champion Michael Bisping continues to grow.

Following a fiery Twitter exchange between the two on Thursday, Romero personally called into Bisping's SiriusXM show The Countdown to confront Bisping live over the phone line.

The phrase "poopy-pants" may or may not have been repeated several times.

Audio of the exchange can be heard below.

Tune into @MMAonSiriusXM at 3pm for the #countdown. We have @madflavor joining us, plus I'll be setting the midget @YoelRomeroMMA straight

— michael (@bisping) February 9, 2017

Let me guess "steroids" blah blah blah "I'm hurt" blah blah "I can't see" blah blah and I won't be a midget when I'm standing over you #ko https://t.co/9iOF6mlCNv

— Yoel Romero (@YoelRomeroMMA) February 9, 2017

@YoelRomeroMMA @MMAonSiriusXM hey Yoel, I'm not gonna argue with your social media intern.But if you wanna talk call in 8447967874 #fake

— michael (@bisping) February 9, 2017

I'm on hold @bisping https://t.co/v4LqVIOixu

— Yoel Romero (@YoelRomeroMMA) February 9, 2017

Afterward, Bisping continued the feud online, tweeting several toilet emojis at Romero.

The back-and-forth took place just one day after Romero trolled Bisping by setting up a GoFundMe account to help pay for Bisping's medical expenses and retirement party after the two potentially compete later this year.

Romero is currently the assumed No. 1 contender for the UFC middleweight belt. Following successful knee surgery, Bisping is expected to return to the cage to defend his strap later this summer, possibly in May.