"tickle" as a slang term?

If you Google tickle scripts you'll find TCL which seems to be a specific language. What you will not find is another "slang" definition which I heard Jorge Luna vocalize during my time at AMD. In his version tickle scripts are scripts allowed by an application which come from its users at large. They are injected functionality by Average Joe User which is both allowed and run in good faith by the greater application which has an architecture not written or understood by Average Joe User which is now extended/augmented by Average Joe. A method signature which takes in a Func or an Action in a C# class library which is used as a third party library (.dll) in several other apps is asking to be tickled in this definition. Herein, an outsider may inject their own functionality.