mimp /MIMP/. noun or verb. An affected pursing of the lips. An overly prim look. To act in an overly precise, fussy manner. Origin uncertain: the OED states that it may derive from mim, which itself is though perhaps, to be “imitative of the action of pursing up the mouth.”
“She took up her book and began so prettily, and so sensibly, where another miss would have mimp’d.” (Hester Lynch Thrale)
“Paphian Mimp, a certain plie of the lips, considered needful for ‘the highly genteel.’ Lady Emily told Miss Alscrip, ‘the heiress,’ that it was acquired by placing one’s self before a looking-glass, and repeating continually the words ‘nimini pimini;’ ‘when the lips cannot fail to take the right plie.'” (John Burgoyne)
“Look at she a-settin’ up ther, mimpin!, idling, playing the fine lady.” (George Dartnell)
“I am so teased and so lectured by the old folks that I sit mimpetty mimp before them merely for peace sake…” (Charlotte Smith)