Bobby Shmurda was just busted again ... this time for shmarijuana -- but the "Shmoney Dance" rapper believes NYC cops have a vendetta.
The 20-year-old was busted for smoking a joint with two friends while double parked on a Brooklyn street ... and Shmurda was hauled off to jail for the night.
Sources close to the rapper tell us ... Bobby believes neighborhood cops are out to get him -- not because he's black -- because he's a big music star and they want to see him fail.
As we previously reported ... Shmurda was busted in June on a felony gun charge ... after he was caught brandishing a 9mm Glock.
After he was released from jail, Bobby posted a video saying it's gonna take more than a few "bum ass" cops to slow his roll.
That will clearly help his case.