n. A musical piece created by combining two songs, particularly the music of one song and the vocals of the other; information created by combining data from two different sources.
Also Seen As
Even before Google gave its blessing, Paul Rademacher was hacking away at the code behind its mapping application so he could mix it with outside real estate data and see exactly where homes listed for sale were located in the San Francisco area.

With such "mashups"—hybrid software that combines content from more than one source—digital maps are quickly becoming a centralized tool for countless uses ranging from local shopping and traffic reports to online dating and community organizing, all in real time and right down to specific addresses.
—Elinor Mills, “Mapping a revolution with 'mashups',” CNET News, November 17, 2005
Ever heard of a "mashup"? This is a music track that combines samples of one familiar song with the recorded vocals from another, such as "Switchin' Alive," with Will Smith rapping "Switch" over the Bee Gees' "Staying Alive."
—Eric Gwinn, “Create your own music 'mashups' with free software,” St. Paul Pioneer Press, November 16, 2005
1999 (earliest)
UTAH SAINTS (London) (1993) Featuring the Slayer-sampling "I Want You" and the classic Kate Bush-sampling "Something Good". Breakbeat pop mashup heroes.
—Rob Fitzpatrick, “Stop the schlock!,” Melody Maker, September 04, 1999
Musical mashups are also called cut-ups, blends, and bastard pop.