This generic-sounding name actually refers to one specific app that let users download and play MP3 files from around the Web. Users could then connect an iPhone to a PC to transfer the downloaded files. The app launched in May 2011, and quickly rose to the top of the App Store charts. (Image from AppAdvice)
Violation: This was quite obviously meant to infringe copyrights–and take away business from iTunes.
Jailbreak Alternative: An app called MusicMeow in the Big Boss repository has similar functionality.