February 25, 2026 mumpsimus [muhmp-suh-muhs] noun: a person who insists on doing things in an incorrect way | A mumpsimus is someone who clings to a mistaken way of doing things, even after the error has been pointed out. This silly-sounding word comes from a story about a priest who kept saying the wrong word during Mass. When stubbornness stands in the way of change, you may be dealing with a true mumpsimus. | Example: Even after being corrected, the mumpsimus continued to write "for all intensive purposes" instead of "for all intents and purposes."
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