Devil’s Advocate is actually a real job – who knew? It used to be a full time position for a Vatican canon lawyer, until the post was abolished in 1983 by Pope John Paul II. However, the case of each candidate for beatification and sainthood still has to have its Devil’s Advocate.
The Devil’s Advocate’s job is to argue against sainthood, and attempt to prove that any alleged miracles etc are fraudulent. A person no longer has to be a canon lawyer – or even a Catholic – to be Devil’s Advocate. In the case of John Paul II, the Devil’s Advocate was a physician. In the case of Mother Teresa, the job was given to an atheist writer.
But I have to say, it would look good on a CV!