Imperviousness to getting in dutch for odiferous methane-expellings.
Churches tend to be liberally tolerant of their parishioners' physical shortcomings as long as they behave themselves socially, so you can generally expect "impewnity" while you're there --- i.e., you can fart all you want while sitting in the chapel's wooden benches, provided you are courteous and respectful in your overall treatment of others present.
by QuacksO May 1, 2022