The great-great-grandmother of one's spouse.
My great-great-grandmother-in-law is a good person.
by Rwopazaq November 24, 2019
Get the great-great-grandmother-in-lawmug. Dude I went down Hollywood Blvd and pick me up a San Francisco Grandmother, 20$ Gummers and 50$ Bummers.
by TheMfingStockingstuffer October 8, 2021
Get the San Francisco Grandmothermug. 
Get the great-great-grandmothermug. Great-great-grandparent's mother.
My great-great-great-grandmother is a good person.
by Mr. Jacov November 23, 2019
Get the great-great-great-grandmothermug. 
Get the great-great-great-grandmothermug. Great-great-great-great-great-great-great-grandmother.
My 8X-grandmother is a good person.
by N8953SW June 26, 2021
Get the 8X-grandmothermug. 
Get the step-great-grandmother-in-lawmug.