Song meaning of Killer Queen by Queen

Oh, Killer Queen by Queen, what a classic. So, this song is about this extravagant woman who keeps Moët et Chandon in her pretty cabinet and declares "Let them eat cake," just like Marie Antoinette. And she’s a built-in remedy for Khrushchev and Kennedy? What? She sounds like a cross between a diva and a mad scientist. But wait, it gets better. She’s got a love for caviar and cigarettes and speaks like a baroness. She’s a killer queen, gunpowder, gelatine, dynamite with a laser beam – not your average girl-next-door. And when she's out of gas, she'll still drive you wild, wild. Oh man, this Killer Queen is a force to be reckoned with and guaranteed to blow your mind. So, if you're brave enough to try, go ahead and try. But be warned, she's insatiable.