It's not looking good for either Casanova or NBA YoungBoy.

Both rappers -- who each have long criminal histories -- are locked up and facing the kind of federal charges that will make their previous stints seem light.

Bobby Shmurda just got home after six-plus years away and he's weighed on Cas and YB's plights by shouting them out.

YoungBoy is facing ten years on gun charges but seems to have skirted any RICO trouble.  Cas is knee-deep in RICO and is starting to feel the pressure of a potentially very long sentence.