Definition of "mashup"

(informal) Something consisting of two or more components combined together.

1. (art, slang) An artistic work that consists primarily of parts borrowed from other works, or features a mixture of genres.  quotations

   Quotations

   • What’s tiresome about Anna, though, is that it's such an obvious mashup of other movies, moving from homage right into ripoff.

     2018 November 27, April Wolfe, “Anna And The Apocalypse is a Holiday-horror Cocktail of Singing, Maiming, and Clichés”, in The A.V. Club‎, archived from the original on 4 November 2019

2. (music, slang) A remix created by combining two or more songs from different artists into one piece of music.

3. (chiefly computing, slang) A derivative work consisting of two or more pieces of (generally digital) media joined together, such as a video clip with a different soundtrack applied for humorous effect, or a map overlaid with user-supplied data.

4. (Internet) A Web application that combines data and/or functionality from more than one source.  examples