Yeah me too. Sorry the "JoS" abbreviation in my previous comment may be too abbreviated. It stands for "Jack of Spades" and typically refers to a white male submissive who serves under dominant Black men. The term plays on the imagery of the “spades” suit in a deck of cards, often associated with Blackness in this context, and the “Jack” representing a lower-ranked figure, symbolising subservience or submission.

I moderate a subreddit r/JackofSpadeGay please come and join the community there if interested.