Definition of miserere mei in US English:

miserere mei

noun

Medicine
historical
  • Intestinal obstruction; the clinical syndrome (severe abdominal pain, faecal vomiting, and obstipation) characteristic of this.

Origin

Early 17th century; earliest use found in Randle Cotgrave (fl. 1587–?1630), lexicographer. From French † miserere mei from post-classical Latin miserere mei, after the first words of Psalm 51.