Get the grandmother-in-lawmug. The great-grandmother of one's spouse.
My great-grandmother-in-law is a good person.
by Rwopazaq November 24, 2019
Get the great-grandmother-in-lawmug. 
Get the step-great-grandmother-in-lawmug. 
Get the great-grandmother-in-lawmug. Spouse's great-great-great-grandmother.
My great-great-great-grandmother-in-law is a good person.
by JAMP12 September 21, 2021
Get the great-great-great-grandmother-in-lawmug. 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. 