Sentence:  <WSD>Black Sanctus</WSD>, a parodic hymn to Satan in ridicule of the monks. The term was sometimes used of any discord of harsh sounds or profane ditty such as might be used to serenade a faithless wife (OED, sanctus, 3). 
Meaning of the word marked with <WSD> tags:  the sounds of dialogue consisting of complaints and expressions of contempt, especially said of a spouse