Origin of sumpsimus
First recorded in 1540–50; see origin at mumpsimus
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for sumpsimus
We are not going to change our old 'mumpsimus' for anybody's new 'sumpsimus.'Res Judicat
Sumpsimus, sump′si-mus, n. a correct expression displacing an incorrect but common one (see Mumpsimus).