What does "one hysterical queen" refer to?

In Bohemian Rhapsody (2018), Queen is discussing about Roger's car song in the upcoming album, which is about to release:

Freddie: We could all murder each other...but then who would be left to record this album?

John Deacon: Statistically speaking, most bands don't fail, they break up.

Freddie: Why the hell would you say something like that? Roger, there's only room in this band for one hysterical queen.

dialogue bohemian-rhapsody

Best Answer

Freddie!

A 'queen', if you didn't know, is an 'overtly gay man'. It's not a description really used in these days of more openness and LGBTQ 'equality' but it was a term definitely used between gay men and their friends [of any gender-bias] to describe a man who displayed 'dramatic tendencies'.

^{I hope I don't come off as some kind of neanderthal in the above description - my intent was not to offend anyone.}