Get the great-grandparent-in-lawmug. 
The great-grandparent of one's spouse.
My great-grandparent-in-law is a good person.
by Rwopazaq November 24, 2019
Get the great-grandparent-in-lawmug. 
Get the grandparent-in-lawmug. The great-great-grandparent of one's spouse.
My great-great-grandparent-in-law is a good person.
by Rwopazaq November 24, 2019
Get the great-great-grandparent-in-lawmug. 
Get the step-great-grandparent-in-lawmug. Spouse's great-great-grandparent.
My great-great-grandparent-in-law is a good person.
by Gerald128 April 7, 2021
Get the great-great-grandparent-in-lawmug.