New York rapper 50 Cent is back on his trolling grind. The hip-hop veteran hit up social media this week to roast his estranged pal Floyd Mayweather Jr.

Fif went to Instagram Monday (December 10) and joked about Mayweather’s return to the boxing ring to take on a Japanese fighter.

Back in mid-November, buzz developed about Floyd gearing back up for a bout against Tenshin Nasukawa.

We talked to Floyd Wednesday night as he left Peter Marco jewelry in Beverly Hills … and he told us the fight is very much alive. “We’re gonna make it happen.” “Rules? It’s gonna be a little boxing exhibition. No kicking,” Floyd told us … “I’m moving around with the guy for 9 minutes, and of course it’s gonna be the highest paid exhibition ever.” (TMZ)

In November, 50 Cent and UFC fighter Conor McGregor have trolled Mayweather’s comeback fight going down next month.