His nibs (her nibs) British humorous informal slang
A mock title that is used to refer to a self-important person, especially who is demanding and tyrannical
His nibs said that we must follow him.
So, do his nibs finish his meal?
Please tell her nibs that she has to clean the floor now!
Tell her nibs that she was a bit late!
To use a specific name for someone
Used to refer to someone whose name the speaker forgets or do not know.
Used to mark someone or something with a symbol, word, or name in order to categorize them.