What does the word "schlanger" mean as used in Mad Max: Fury Road. I guess it's an Australian word.
Schlanger is an Australian slang term for dick, or more anatomically, penis. It is similar to the term schlong commonly heard in American English. It is an ockerism, a term associated with the language of ockers, those who speak and act in a rough or uncultured way with a Strine, a broad, exaggerated form of the Australian accent.
Schlange is the german word for Snake. Likely where the Australians got the word from in the first place.
When I watched the film I assumed they meant that, and given they're talking about Max, who is outright seen eating a lizard (raw!) at the start of the film.
I assumed they meant it entirely literally, he's a crazy wastelander who eats snakes. Entirely accurate.
With the added double-entendre that he "eats dick", since she's trying to insult him too.