noun, plural mump·si·mus·es for 2.
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Origin of mumpsimus
Words nearby mumpsimus
Example sentences from the Web for mumpsimus
We are not going to change our old 'mumpsimus' for anybody's new 'sumpsimus.'Res Judicat|Augustine Birrell
Sumpsimus, sump′si-mus, n. a correct expression displacing an incorrect but common one (see Mumpsimus).
On being remonstrated with, he retorted that “He would not leave his old mumpsimus for their new sumpsimus.”Robin Tremayne|Emily Sarah Holt
Mumpsimus, mump′si-mus, n. an error to which one clings after it has been thoroughly exposed.
Mr. Beckford called the beast, or reptile, a mumpsimus (sic).Recollections of the late William Beckford|Henry Venn Lansdown