The first time I heard the time 'technical debt' was during a discussion on software related activities to fixing something that is not a bug or a feature which

The first time I heard the time 'technical debt' was during a discussion on software related activities to fixing something that is not a bug or a feature which are usually the two main categories that the product owner cares. You meet your deadlines and the customer is elated with the software/product, then 'technical debt' is the whatever bucket.