Earlier, the professional boxer shared on Instagram a jaw-dropping $18 million watch he had just purchased.

He captioned a video of his sparkling wrist jewellery.

"This my new timepiece, it's called "The Billionaire Watch". If you don't know about it, google Billionaire Watch. That's $18 Million on the price tag. I bought this watch from the best jeweler in the world."

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After Mayweather shared the news, 50 Cent, who couldn't keep quiet, proceeded to troll the boxer on Instagram.

He wrote, "Man, they done found the 1 fool in the world, dumb enough to buy that watch. LOL get the strap"

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Mayweather is yet to respond to the troll but it will be interesting to see how he reacts to the direct shade from 50 Cent.