The king is dead long live the king expression informal
The traditional declaration of a new monarch's ascension after the death of the former one.
George III has passed away, and his son, George IV will succeed him. The king is dead, long live the king!
When a person or thing is no longer the most powerful, popular, influential, etc., someone or something else takes their place.
The new TV's sales have soared, even eclipsing the Sonic, which had previously dominated the market. The king is dead, long live the king!
Used to describe the action of taking someone's position or place.
This statement is said to have been used in France after the deaths of Charles VII in 1461, Louis XIV in 1715, and Louis XVIII in 1824. This allusion to the notion of royal succession, which is significantly less essential nowadays, is now more frequently applied to other bastions of authority, such as chief executives of huge firms, political party leaders, and so on.
To argue with somebody
I do not want to bandy words with you about those trivial things.