black sanctus

noun2

1. •
   (no longer used) A profane or blasphemous parody of a hymn.

   • I knewe I would make him soone change his note, / I will make him sing the blacke sanctus, I holde him a grote. — 1578
2. •
   (figurative, no longer used) Harsh words, especially profanities, or other dissonant noises; a cacophony.

   • As plesaunt to the ere as the blacke sanctus / Of a sad sorte vpon a mery pyn. — 1533