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Быть святее Папы римского stresses
idiom.	be more Catholic than the Pope (Andrey Truhachev)
быть святее папы римского
idiom.	be holier than the Pope ('More); be a greater Catholic than the Pope (см. be holier than the Pope 'More)
proverb	more holy than the Pope ("More holy than the Pope" denotes s.o. who is trying to seem better than he is)
Быть святее Папы Римского
idiom.	be more papal than the pope (Andrey Truhachev); be more royalist than the king (Andrey Truhachev)