According to the search results, "paper route money" is a term used to refer to money left in secret places so people don’t get caught with it. It is essentially a dead drop, where two individuals can exchange money or items in a secret location unlikely to be found by anyone else. This type of exchange is often associated with nefarious activities, particularly those involved in criminal activity or drug deals. The term "paper route" can also refer to a place where a dealer sells drugs from.

It is important to note that the term "paper route" can also refer to a job where individuals deliver newspapers to customers homes. However, this is not the context in which the term "paper route money" is being used.

In the context of the viral TikTok video where a man found a stash of hidden money underneath a grate on the street, some TikTok users warned him that the money he found could be "paper route money" and that he should leave it alone.