UFC Star Conor McGregor Calls John Cena A "Failed Mr. Olympia Mother F*cker”

UFC star Conor McGregor recently took to bashing WWE talent, but it would appear he's not done. McGregor has now set his sights on insulting WWE's top Superstar, John Cena.

Last week he called WWE wrestlers “a bunch of messed up p”*ssies during a media conference call to promote UFC 202. In his most recent comments directed at John Cena he has shown very little respect for the WWE mainstay:

“What’s the main guy? John Cena. He’s 40. He’s 40 years of age. He’s walking around in a luminous orange t-shirt and a headband talking about nobody can see him. We can see him right there. He’s a big fat, 40-year-old failed Mr. Olympia mother f*cker.”

John Cena responded on Twitter:

"Achievement often breeds contempt. The more you achieve the more contempt you will see. Stay focused on you and moving forward. #NeverGiveUp"