Wow, what a turnaround time for the Urban Dictionary:
Too pooped to Pope:
February 13, 2013 Urban Word of the Day
When the Pope must tender his resignation and can no longer perform his prescribed duties because of old age, Catholic Church and Priests indiscretions and lots of inappropriate fondling.Pope Benedict XVI is too pooped to Pope and is therefore resigning, apparently due to his age, frailty and stress from an over abundance of Catholic Church hanky panky.
How about "Oh, Pope off"? Pope one's cork? Pope-down menu? Apopeplexy?