Meaning of black sanctus in English:

black sanctus

Pronunciation /blak ˈsaŋ(k)təs/

noun

historical, rare
  • A parody of a hymn; a discord of harsh sounds, especially one expressing contempt or dislike, typically to an unfaithful spouse.

    "to sing the black sanctus": to lament.

Origin

Mid 16th century. From black + sanctus.