the Professy Nigga is a person that spreads prophecies around to random people online. they also spelled “prophecy” wrong which adds to the humour. they choose their targets at random so people never know who’ll be next. their “prophecies” also seem to be complete nonsense.
Person A: hey someone told me last night that I was gonna lose a show
Person: that wasn’t a person, that was the Professy Nigga