You gotta be really brave or really stupid to take on Floyd Mayweather in a fistfight, right?

It seems Grammy Award-winning rapper-actor T.I. was a bit of both when he took a swing at Money, the undefeated world champion boxer with 46 wins and no losses under his belt. No word if T.I. connected but that punch sparked a wild brawl at Fatburger on the Las Vegas Strip yesterday that is trending hot on social media.

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You can see the Mayweather vs. T.I. "Battle Inside Fatburger" on The New York Daily News website at http://nydn.us/1jRSmE1.

Entertainment website TMZ said T.I. was pissed at rumors Money might be making a play for his wife, Tameka "Tiny" Cottle. Tiny wasn't at Fatburger during the brawl but she was in Vegas.

What apparently set off T.I.'s rampage was a photo his wife earlier posted on Instagram. Tiny and Floyd's daughter had been hanging out and Tiny posted a photo of both of them on her Instagram account, "majorgirl."

The caption reads, "Had to come celebrate with my new boo."

Press reports said T.I. was upset about the photo and others Tiny posted posted, for whatever reason. They said T.I.  felt the photos were disrespectful of him.

But, unlike any normal guy who'd cringe at the thought of confronting Money, T.I. searched Money out. T.I. found the boxer chowing down a meal at Fatburger's surrounded by his beefy bodyguards.

T.I., who brought along his own bodyguards, started jawing while Money was chomping and got the champion's attention in a bad way.

Witnesses said Mayweather shouted at T.I., "control your b---- motherf-----."

That set off T.I. who threw a punch at Money. Money fought back and videos of the fight shows their bodyguards getting into it; chairs flying and people screaming in panic.

Cops later reported one minor injury. There were no arrests.