Like many before him, Bobby Shmurda returned home from prison buffer than he was when he went in.
Since he's been out, he's been trying to maintain his swole.
Only now he's able to do his workouts while smoking weed.
Bobby is still on probation and there is some debate as to whether he's allowed to be smoking weed, which is now legal to possess in New York state.
It's likely up to his PO or the specific terms of his probation. Since he posted the photo on his social, he's probably in the clear. Although self-snitching has been at an all-time high.
It could also just be tobacco.