CONOR McGREGOR attacked Alexander Volkanovski at "little fart", but was then asked to return to featherweight.
McGregor watched as Brian Ortega, an Irishman, retained his 145lb title against McGregor.
Alexander Volkanovski, UFC champion, called out Conor McGregor
In a now-deleted Twitter, the former UFC champion at two-weight took aim at Volkanovski at 5ft 6in.
McGregor, 33 years old, wrote: "I'd kick that volovski (sic), head off like it were a rugby ball I was playing with. 5'4 Full of muscle!
"Hahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahaha He is not even very far. "A shart haahahahaj Jackass!"
He added, "Not a bad battle. Congrats shartsy."
McGregor hasn't fought at featherweight since 2015, the night Jose Aldo famously knocked him out in 13 seconds to win the title.
Then, he fought Nate Diaz twice at Welterweight one year later, before winning the UFC lightweight title against Eddie Alvarez.
McGregor has never lost in this division in UFC.
Volkanovski (32), offered the southpaw star a chance at reclaiming the throne that he once ruled over.
He stated, "Sounds as if he's out of his head. Bravo! Enjoy your evening, but remember to get back down to featherweight. It would be a pleasure.
"He thinks he is the man in the featherweight division, and I again got the strategy.
"I'm clearly tough and I'm a completely different beast from what he used to in this division so welcome back! It would be a pleasure.