Black Pope ???

"Black Pope"

is a derogatory nickname given to the Superior General^[1] usually by the media (and never used by the Jesuits themselves). 

The name comes 

- partly from the color of the plain black priest's cassock, worn by members of the Society, including the Superior General, 

- partly from a past concern (most prominent around the 16th and 17th centuries) amongst Protestant European countries concerning the relative power of the Jesuits within the Roman Catholic Church, and 

- partly because the Superior General is elected for life.

http://en.wikipedia.org/wiki/Superior_General_of_the_Society_of_Jesus#Black_Pope

Notes and references

1. ^ David G. Schultenover (1993). A view from Rome: on the eve of the modernist crisis. Fordham University Press. p. Back cover. ISBN 0823213595.