from The Century Dictionary and Cyclopedia
- n. A mother-in-law.
Sorry, no etymologies found.
Carrie looked at Tem and Dallas staring at them in big-eyed wonder and tried to put on a good-mother face.
Has the leech let blood to thy good-mother, Susan?
Lye said they were _quasi_ good-father and good-mother; Somner, that they were the Anglo-Saxon
"But it's true, too, as Hiram Crombie's no owerfond of the auld bes-er, his good-mother.
( "hellcat" Ida & slapping prostitute), and (as you suggest) combination good-mother/bad-mother (Peggy).