Mumpsimus (n)
mump-si-mus
AÂ traditional custom or idea adhered to although shown to be unreasonable.
AÂ person who obstinately adheres to old customs or ideas in spite of evidence that they are wrong or unreasonable
Example sentences
“Oh she’s such a mumpsimus, she’d still have you believe getting wet gives you a cold. ”
“It doesn’t matter how much science proves itself, he holds on to the mumpsimus of the Earth being flat.”
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