What is a gay queen of sheba?

What is queen of sheba?

A nickname, used by gay men, for another male, who is black and homosexual.

In gay parlance, Queen can imply someone who more feminine, than their normal male counterpart.

It can also be used to reference someone who is more above or dominating, than most others, within their particular circle or group.

Possible slur, in that it can imply one has the impression they are superior to the others in their circle.