n. An extremely long voice mail message.
2000
Voice novel: noun. Extremely long voice mail message. Typically found on old-style home answering machines with tapes, because the newer home models with "digital memory" just cut off the long-winded people.
1998
At first, many of these acronyms and neologisms (such as webmonkey and GIF jockey) were used by non-tech types to show off their knowledge of high-tech's burgeoning subculture. It was fun to know the meaning of SGML and refer to lengthy phone messages as voice novels.
1997 (earliest)
Voice novel — A voice mail message that goes on forever.