When I was growing up, in the Berlin-area, 80s and 90s, I learned the word "Pupengang" as a synonym of "Angst", especially before giving talks/presentation or before visiting the dentist. One could say it is related to "Lampenfieber" for more generic situations.
A quick Google-search revealed no origin or first references or usages, could someone help me out there? I'm looking for its "inventor".
I'd not be surprised if someone like Goethe is the original author. I can clearly picture why the word exists, as my stomach works hard, just before the mentioned events. It's this kind of words which makes German a funny language for me.