From Wiktionary, the free dictionary
Mast + Darm
Mastdarm m (strong, genitive Mastdarmes or Mastdarms, plural Mastdärme)
- (anatomy) rectum
Declension of Mastdarm [masculine, strong]
- “Mastdarm” in Duden online
- “Mastdarm” in Digitales Wörterbuch der deutschen Sprache