Religion of the Yellow Stick
The religion of the yellow stick (Scottish Gaelic: Creideamh a’ bhata-bhuidhe) was a facetious name given to the enforcement of the Church of Scotland among certain Catholic churchgoers who lived in the Hebrides of Scotland. Such actions, however, were not unique to the Hebrides, but occurred in other parts of Scotland.
Source: Wikipedia — Religion of the Yellow Stick (CC BY-SA 4.0)