Rehash

[Couch Potatoe]

To hash over again; to prepare or use again; as, to
rehash old arguments.

[Couch Potatoe]

A rehash is commonly used to refer to a [remix] of a song by another artist without much or any really change to the song itself. Seen a lot in pop, rap, techno music today, and very frequently with jazz and classical music in the earlier years.
Usually easily identifiable by the very similar, or exact-sounding lead, bass, or drum lines heard in a song.

Though, take care to remember that some DJs and artists can very easily remix a song, that uses a lot of the same lyrics and lines as the original. But still add new beats, breaks, and a new feel to the song, and have the song be a legitimate remix.

[Luis Fok]

to be an uber IRC pimp and to <3 mendy.

[Dianne]

Reuse (old ideas or material) without significant change or improvement.