The child-in-law of one's spouse's sibling.
My co-nibling-in-law is a good person.
Someone who’s pullin, packin, and ready for action.
Not pullin person: Hey look over there it’s Chimp Co. I bet he’s pullin unlike me.
Spouse's first-cousin-thrice-removed's spouse.
My co-first-cousin-thrice-removed-in-law is a good person.
The grandchild-in-law of one's parent-in-law's sibling.
My first co-cousin-nibling-in-law is a good person.