From Wiktionary, the free dictionary
Wal + Speck
Walspeck m (strong, genitive Walspeckes or Walspecks, plural (uncommon) Walspecke)
- whale blubber
- Synonym: Blubber
Declension of Walspeck [masculine, strong]
- “Walspeck” in Digitales Wörterbuch der deutschen Sprache