A more thorough explanation:

rien luy doit

Rien luy doit is a legal term that means "owes him nothing" in English. It was used as a plea of nil debet in the past.

Example 1: In a court case, the defendant may use the plea of rien luy doit to argue that they do not owe the plaintiff any money.

Example 2: A person may use the term rien luy doit in a conversation to indicate that they do not owe anything to someone else.

These examples illustrate how the term rien luy doit can be used in legal and everyday contexts to indicate that there is no debt or obligation owed to someone else.