gammer definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
an old woman, esp. one from the country: now usually humorous
Origin: altered ; from godmother
gammer definition by American Heritage Dictionary
noun Chiefly British
An elderly woman.
Origin: Probably alteration (influenced by grandmother) of godmother.