Rap Mogul Curtis "50 Cent" Jackson used to be friends with rapper Tekashi 6ix9ine. Now not so much.

Last year Tekashi, real name Daniel Hernandez, was arrested on RICO charges. And since then, he's turned "snitch" and is cooperating with federal prosecutors - and help with getting his former friends locked up.

And some of the people that Tekashi is "snitching" on, are friends and associates of 50 Cent.

But before Tekashi turned snitch - the two were like family. In fact, 6ix9ine and 50 Cent have referred to each other as family on social media. The 22-year-old Brooklyn rapper has referred to 50 Cent as his father, while 50 Cent – real name Curtis James Jackson III – has called 6ix9ine his son.

In a few days Tekashi will officially take the stand, and testify against two of his former friends - reputed Nine Trey Gangsta Bloods Anthony Ellison and Aljermiah Mack.

And yesterday, 50 dropped a subliminal - or not too subliminal - shot at the cooperating rapper.

Here's what 50 posted:

Although 50 didn't tag any names, fans speculated in the comments. The rapper is known for trolling on Instagram, so the post comes at no surprise. Tekashi and 50 have displayed their public beef a few times before. Tekashi once mocked 50's career and 50 has called Tekashi gay for wearing a sparkly jacket to the Latin Grammys. This could quite frankly just be more fuel in the fire.