A more thorough explanation:

Successor titulo lucrativo post contractum debitum is a legal term in Latin that refers to a person who inherits a profitable title after a debt has been incurred.

For example, if a person owes a debt to someone and then passes away, their heir may become the successor titulo lucrativo post contractum debitum if they inherit a profitable title, such as a business or property.

Another example could be a company that goes bankrupt and owes money to its creditors. If another company buys the bankrupt company's assets and takes over its profitable contracts, the buying company becomes the successor titulo lucrativo post contractum debitum.

These examples illustrate how a person or entity can become the successor under a lucrative title after a debt has been contracted. It is important to note that this term is typically used in historical legal contexts and may not be commonly used in modern legal language.