YNW Melly is locked up and awaiting trial for killing his crew members YNW Juvy and YNW Sakchaser.  

He's still dropping music -- he recently released a track with former fellow Florida jailbird Kodak Black.

Melly's latest, "Na Na Boo Boo" includes childish taunts and more adult threats.

"Shorty wanna f*ck me, but I know the p*ssy musty
I am not a cleaner, but you know that p*ssy dusty
That choppa gon' kill you, I swear to God we drill you,"Melly raps.

Melly recorded the track a few years ago.  Nevertheless, is that appropriate content for an accused killer to drop now?