What is the definition of Furtwangen?

"Furtwangen is a German word that's basically the German equivalent of 'neaky monkey' but with a whole lot more legal implications. It describes someone who is cunning, opportunistic, and always one step ahead, like a monkey trying to sneak into a bakery with a bag of cookies. Here's an edgy example: "He was a furtwanger, so stealthy he could steal the city's most valuable art collection without anyone even registering the heist."