now that proverbs for a strong feeling of hunger have been posted in the EN- FR forum, I started looking for some German terms for this:
you can replace "Mordshunger" by
- (mächtigen) Kohldampf
- Bärenhunger
- Wolfshunger (I didn't hear this often)
or you can say: mir hängt der Magen bis zum Knie (My stomach hangs down to my knees)