Answer:
Hey, I think it means to think about something too much or to think for too long.
Hope this is what your looking for.
Answer:
When you think too much in terms of intensity or longevity.
It's also 21st century disease. There is a concept called "Unlearning" to empty your mind as well as many books trying to help with overthinking - e.g. Petitcollin Christel "The art of overthinking"
