Floyd Mayweather has laughed off a rematch against Conor McGregor while calling him a "kid" and a "clown" in a savage outburst.
Mayweather stopped McGregor in August 2017 to record his 50th professional boxing victory.
The UFC superstar remains hellbent on running back their lucrative boxing bout, but the American has dismissed talks of a second meeting.
"Boy, boy, boy, boy, boy... these kids are some circus clowns," the 42-year-old former pound-for-pound king said. "They can't f**k with Money May.
"They gonna keep coming my way. At the end of the day, I keep laughing, I keep living, I keep going to the bank."
Mayweather called time on his glittering boxing career following his victory against the Irishman with a perfect pro record. 50 wins from 50 fights.
But with the huge success of their first meeting, he could be tempted to come out of retirement to face McGregor, whose had just one fight since his boxing contest in Las Vegas.
McGregor lost his UFC return to Khabib Nurmagomedov who submitted him in the fourth round to defend his UFC lightweight title.
Mayweather also touched on boxing's heavyweight division. He insists Anthony Joshua can bounce back from his first professional defeat when he faces Andy Ruiz Jr in the rematch.
"In boxing, anything can happen," he said about Joshua's lost.
"Any given night, anything can happen. Can he bounce back? Absolutely," he continued to say. "Like I said before, in the sport of boxing, s**t happens."
Ruiz Jr and Joshua are expected to meet before the end of the year with a bout in Cardiff or New York mooted.