Nearly a hundred years after its publication, Kurt Gödel's famous proof that every mathematical system …
He always kept the door of his office at Fine Hall open, and had a running bet with a colleague that if either caught the other working, the guilty party had to pay ten dollars. Von Neumann was never caught.
— Journey to the Edge of Reason by Stephen Budiansky (Page 156)
The word is about Johnny von Neumann at Princeton ;)