Mock title (such as your majesty) used to refer to an authoritative, bossy or demanding person. It could be a grown up or a child acting like a spoiled brat. For a female you may use Her Nibs.
"His Nibs is demanding his coffee immediately" - when a boss decides that he has to send out someone to get his coffee because he is just "too busy" to get it himself
by Swaggy Rogers January 6, 2017