Gaethje calls Mcgregor a cheater at the UFC 291 post fight press conference

Conor McGregor hasn't failed a drug test, but Justin Gaethje has once again claimed that he uses steroids.

The Highlight defeated Dustin Poirier with a head kick at UFC 291 to record his finest victory to date and claim Jorge Masvidal's former BMF [Baddest Motherf*****] championship.

Post-fight, McGregor took to social media and expressed his desire to skip a fight against Michael Chandler and instead face Gaethje when he returns from his two-year injury layoff.

“Justin, I’ll slap you around,” he tweeted.

“I’m the real bmf, he can fight for pennies if he wants but I want spirits, I call the shots, I’m in it to launch shots, f*** chandler, you want it call for it.”

Gaethje was asked about McGregor’s Twitter activity during his post-fight press conference and refused to rule out fighting MMA’s biggest star.

"I think he's turned me down six times," he said.

“Usually, you have to lose to fight him, so I don't know what's going on.

“I don't know, you know I don't really care, I don't really care.

“Whatever, I fight MMA. I like to fight big fights and I like exciting things - it sounds pretty exciting to me.”

However, he insisted a fight between him and McGregor will not happen unless the former dual-weight champion rejoins USADA and proves he’s a clean athlete.

“I’m not going to fight someone on steroids,” Gaethje added.

“I’ve never taken steroids in my life, never will. Well, maybe when I retire I might. I’ve never taken steroids and I don’t want to fight someone who is cheating.

“I probably shouldn’t say that [because] I want the fight, but it’s the truth.”