Retired boxing champion Floyd Mayweather is not done with Conor McGregor. The sports icon has gone to social media to troll the UFC superstar.

Money Mayweather hopped on Instagram Thursday (December 15) with footage of McGregor getting whooped and encouraged followers to caption it.

CAPTION THIS! Best caption wins $10,000.00. The winner will be announced on Monday, Dec 19. Stay tuned ! #TMT

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A few weeks ago, Conor made headlines after landing a California boxing license.

“He got a license today and a federal ID,” California State Athletic Commission executive officer Andy Foster confirmed with MMAFighting.com. “He’s a California boxer now.” This news comes just days after the UFC unceremoniously stripped McGregor of his 145-pound title, which he won less than 12 months ago, and named Jose Aldo the new champion. He remains the UFC lightweight champion. (MMA Fighting)

👀 Conor McGregor was issued a boxing license on Wednesday….

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THIS JUST IN: Conor McGregor has been issued a professional boxing license in California. (via Brett Okamoto)

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Last month, Mayweather publicly shut down the media’s McGregor comparisons.

“I didn’t know Conor McGregor was undefeated,” Floyd told a paparazzo when compared to him. “I didn’t know he had a reign in the MMA for 20 years and was undefeated and was world champion in five different weight classes. So I guess you guys are telling me something new if you’re saying he’s the Floyd Mayweather of the MMA. I mean, if you’re saying he’s the Floyd Mayweather of the MMA, I’m trying to find out. Have you ever made $300 million in one night? Have you ever made $100 million in one night? Have you ever made $70 million in one night?” (TMZ)

During a recent press conference for UFC 205, McGregor did not hold back the possibility of getting Mayweather to fight him.

“Who the f*ck is that guy? Who the f*ck is that? Who the f*ck is that? Oh my God. When I take that guy’s belt – when I take that guy’s belt, I’m looking around, I don’t know what anybody else has – I might have to jump up and f*cking drag Floyd Mayweather and see what the f*ck he’s at.”