Hello,

I'm not Austrian but i'm quite sure about this: Gschisti-Gschasti is a wordplay wherre Gschisti should be pronounced 'Gschissti' or 'Gschißti' because 'Gschiss' is an informal word for shit :)

Then, i think, Gschast also should be Gschassti because 'gschasst' means you're beat or duped. 

Ask some Austrian about this ;)