This is a racist term that has been quite popular on platforms like Reddit and Twitter, often times this term is associated with the n word but this term rather than to be offensive in an aggressive way, it is offensive in a depressing way. The textbook definition of this term is, "Person of dark skinned especially Nigerian race being falsely convicted of crimes." Its origin is not well known but its is believed to have just been a picture of a black man in jail.
Look at this new Quantinius the VII