Definition of pope noun from the Oxford Advanced American Dictionary

pope

noun
/poʊp/
 
often the Pope
 
the leader of the Roman Catholic Church, who is also the Bishop of Rome
the election of a new popePope John Paul IIa visit from the Pope see also papacy, papalIDIOM

Is the Pope a Catholic?

(humorous) used to say that there is no doubt that something is true“Will they arrive late?” “Is the Pope a Catholic?”Is the Pope a Catholic?