50 Cent trolled Busta Rhymes and made fun of his very thick neck.

"And the award for strongest neck in Hip Hop goes to Bussa Buss," wrote 50. "Get the strap."

50's post caught the attention of Casanova who responded via text.

"Busta gonna fuck you up," Casa wrote.

"I'm the original Don DaDa around here," 50 wrote back. "You niggas are the new regime."

50 then posted a photo of Bus and Dirty Money CEO Big Fendi and wrote another funny message.

"Big Fendi and Busta Rhymes are trying to have me killed, so I'm going to the UK to lay low," he wrote.

The last back and forth 50 had was with Floyd Mayweather, right after Nike released its commercial with Colin Kaepernick. He also had a playful exchange with Tekashi 6ix9ine and Don Q last week.

What do you think about Fif clowning Busta?