What the hell is a mashup?

Mike Relm : example of a music “mashup” check him out at mikerelm.com

From Wikipedia, the free encyclopedia

In web development, a mashup is a web page or application that combines data or functionality from two or more external sources to create a new service. The term mashup implies easy, fast integration, frequently using open APIs and data sources to produce results that were not the original reason for producing the raw source data. An example of a mashup is the use of cartographic data to add location information to real estate data, thereby creating a new and distinct web API that was not originally provided by either source.