6.5-tuple-fourth-cousin

6.5-tuple-4C: Person who, in relation to the other person, has zero parents, zero grandparents, zero great-grandparents, zero great-great-grandparents and thirteen great-great-great-grandparents in common.

My 6.5-tuple-fourth-cousin is a good person.

Incest Cousin

A cousin that one has sexual intercourse with.

"I heard you've been seeing your cousin."
"Yeah, we're incest cousins."

15.5-tuple-fourth-cousin

15.5-tuple-4C: Person who, in relation to the other person, has zero parents, zero grandparents, zero great-grandparents, zero great-great-grandparents and thirty-one great-great-great-grandparents in common.

My 15.5-tuple-fourth-cousin is a good person.

Cousin stew

When the whole family nuts in one chosen cousin and you each proceed to take turns to sip off the stew.

Hey did you go to gage's cousin stew last night? It was the best I've ever had!

second cousin-niece

Second cousin's daughter.

My second cousin-niece is a good girl.

first cousin-nephew

First cousin's son.

My first cousin-nephew is a good boy.

irregular-octuple-fourth-cousin

Someone who, in relation to others, has zero parents, zero grandparents, zero great-grandparents, zero great-great-grandparents and fifteen great-great-great-grandparents in common.

Irregular-octuple-fourth-cousin.