Those who were raised as adherents of the SWB and are of a certain age (ie, probably over 45) will remember St. Christopher, the patron saint of travel and lots of other things. Well, if he cares to, the Pope can now take advantage of a free membership that will assist him in getting around in the style to which he is now accustomed.
The Urban Dictionary defines SWB as “skirt wearing bitch”. Somehow, I don’t think that’s what it means in your context.
SWB equals “Scarlet Whore of Babylon”, an epithet referring to what MadPriest calls “The Italian Church”. Sorry about the mixup…