“Where you at McNugget, you f***ing piece of s**t?” Ferguson said in his post-fight interview

CONOR MCGREGOR has yet again found himself on the receiving end of a call out from Tony Ferguson.

Ferguson began his campaign for a fight with McGregor immediately after claiming the interim lightweight title in the main event of UFC 216. 

"Where you at McNugget, you f***ing piece of s**t?" Ferguson said in his post-fight interview with UFC commentator Joe Rogan. 

"You better defend that title or vacate!"

The Ultimate Fighter season 13 winner has fired several shots McGregor's way since then, most of which have highlighted the Irishman's failure to defend his lightweight crown. 

McGregor's head coach John Kavanagh poked fun at Ferguson's 'defend or vacate' campaign last weekend on Twitter, repeatedly tweeting Ferguson's often used saying with a gif from The Walking Dead. 

But judging from Dana White’s recent comments on McGregor’s future, that’s not the case.

“I don’t think Conor wants to fight until August,” the UFC president said in an interview with Yahoo Sports' Kevin Iole. 

“If he waits until August or September, that’s around two years since the belt has been defended and that can’t happen.”

McGregor, 21-3, hasn't set foot inside the Octagon since claiming the lightweight title 14 months ago in the main event of UFC 205. 

His first fight back in the promotion is expected to be a lightweight unification bout with Ferguson. 

It didn't take too long for Ferguson to get wind of Kavanagh's taunt and he responded in typical fashion.

In the early hours of Sunday morning, Ferguson posted a video of himself hitting a speed bag to his official Instagram page.