The granddaughter-in-law of one's spouse's sibling.
My co-great-niece-in-law is a good person.
by Elivaldeq November 24, 2019
Get the co-great-niece-in-lawmug. Spouse's great-great-granduncle's wife.
My co-great-great-grandaunt-in-law is a good person.
by JAMP12 September 21, 2021
Get the co-great-great-grandaunt-in-lawmug. 
The grandchild-in-law of one's spouse's sibling.
My co-great-nibling-in-law is a good person.
by Elivaldeq November 24, 2019
Get the co-great-nibling-in-lawmug. 
Get the co-grandpibling-in-lawmug. Spouse's relative-without-designation-in-law's spouse.
Co-relative-without-designation-in-law (co-RWD-in-law).
by Kapokapo July 15, 2024
Get the co-relative-without-designation-in-lawmug. by Cuck-maker-69 August 2, 2019
Get the co-ingmug.