ETYMOLOGY
from mimp (prim, precise, affected; also, n. a prim or affectedly modest woman)
EXAMPLE
“…It is not many people indeed I should praise so warmly; but as to all squeamish prudery in not speaking what one thinks, I’ve no notion of it, though I am so teased and so lectured by the old folks that I sit mimpetty mimp before them merely for peace sake; but I don’t see why one may not admire an handsome man as well as an handsome stature, or an handsome animal, or any thing else that is beautiful…”
From: The Young Philosopher:
A Novel in Four Volumes
By Charlotte Smith, 1798
Lexicophilia 