What is the phrase or word for person that are very faithful in their place of worship (the pejorative usually applies to persons who are showy to the point of hypocrisy), but that are anything but during the rest of the week?
If I recall there are some pretty derogatory ways of putting it (from both faith/less camps); I am looking for a relatively less mean, faith neutral pejorative (i.e. not some incendiary atheist phrase). The words that are somewhat forming in my head are something like "Sunday Christian" or "Someddays Faithful" or something like that.