Controversial US rapper, 50cent, has been trolling UFC champion Conor McGregor on Instagram after he lost to Floyd Mayweather in their mega money fight on Saturday night.

Recall that in July, McGregor took a shot at 50 Cent during a joint press conference with Mayweather at the Barclays Center in Brooklyn.

“What’s up New York City?” The Irish professional mixed martial artist and professional boxer said. “50 Cent’s a (expletive). You and 50 are two fake money (expletives). He’s bankrupt, and you’re about to be.”

Shortly after the press conference wrapped up, a response immediately came from 50 Cent on Instagram.

What the f**k wrong wit this white boy, you fighting Floyd not me fool. LOL

But in a series of Instagram posts today, 50cent is having the best laugh after McGregor lost his first boxing match.

See his posts below..