What is zappa lather?

Frank Zappa's album "Läther" is a quadruple album that was originally intended to be released in 1977 but was repeatedly delayed due to disagreements with his record label. It was eventually released posthumously in 1996 after Zappa's death. The album consists of a mix of unreleased studio and live recordings, with many featuring Zappa's signature style of eclectic and experimental music. It was initially intended to be released as a single album, but due to the label's insistence on releasing a greatest hits album without Zappa's input, Läther became a sprawling accumulation of many different recordings. The album is widely regarded as one of Zappa's most ambitious and diverse works.