Why Missal Thumper?

It occurred to me that I should probably explain the title here. One day my cousin referred to her traditional Protestant sister-in-law as a "bible-thumper", and it got me thinking. What would you call a traditional Catholic? "Mackerel-snapper" is too old. Then I remembered the 1962 Missals we bought when we decided to become parishioners at St. John Cantius (PLUG: BEST PARISH IN THE WORLD, YOU MUST GO IF YOU CAN). Ah-HAH!!! MISSAL thumpers!