Lyric discussion by rocker115 

I don't believe this is metaphor at all. The King Rats are one year tenure leaders of the Grand Order of Water Rats, which is a charity group of theatre people, and I believe the lyrics refer to one of these who is obviously not named for legal reasons. There is a list of them on some websites with the years they were "king" for. All you need to do is go through these...

@rocker115 Holy shit. I came here because I worked this out and was going to shae that it was George Martin, King Rat of 1971 when Freddie wrote the song, and why... It has to do with comments John Lennon made about George "the 5th beatle" Martin in an interview...It's all in George's Wiki article, you just need to look at the time Freddie would have been paying attention...

@michaelnyx - one fact - George Martin died 1991 at the age 69 as a complication after suffering stroke. So its not the name.

Welladay, i didnt find (in my sources) anybody who died at 44 on syphilis and was a Great King Rat.

An error occured.