What does "break-up of the body after death" mean in the suttas?

The Pali suttas, particularly in teachings about kamma, has the phrase: "*at the break-up of the body after death*". Are there contexts other than kamma where this phrase is used? What does "*break-up of the body after death*" actually mean in the suttas? Are these words in the language of materialism? Do they have a non-materialistic meaning?