Young Buck’s nemesis 50 Cent didn’t waste any time poking fun at his former artist’s expense. Fif shared a photo of Buck’s mugshot on Instagram and joked about his head structure.

Young Buck is heading back behind bars after ... indicating the humor he found in Buck’s mugshot photo. See 50 Cent’s Instagram post below.

He is currently serving a 30-day sentence for violating his bond supervision at least six different times, according to DA’s office.

50 Cent has predictably shared a response to former G-Unit rapper Young Buck's arrest for missing multiple meetings with his bond supervisor. Fif has been at odds with Young Buck for years ...

A spokesperson for Young Buck has released the following statement to XXL regarding the rapper's recent arrest: "Although Buck is innocent and he was in fact the victim in this case ...