Your female cousin whom you are so close with that your relationship reminds you of a loving pair of sisters.
by John Jacob Allen Smith March 5, 2024

Undecuple-4C: Person who, in relation to the other person, has zero parents, zero grandparents, zero great-grandparents, zero great-great-grandparents and twenty-two great-great-great-grandparents in common.
My undecuple-fourth-cousin is a good person.
by ABGR June 9, 2021

Child of their parent’s half-sibling with their other parent’s half-sibling or the child of their mother's maternal half-sibling with mother's paternal half-sibling or the child of their father's maternal half-sibling with father's paternal half-sibling.
My double-half-first cousin is a good person.
by Mr. Jacov November 23, 2019

Slang used by Sailor Moon fans as a humorous euphemism for sapphic couples. Refers to Cloverway's English language localization of the original 1992 anime, wherein prominent lesbian lovers Sailor Uranus and Sailor Neptune were changed to being cousins due to censorship laws of the time
by Mamoru Chiba April 22, 2025

Judy: Hey, Claire. Wanna go swimming with me?
Claire: Aww, I can't. My cousin is here. Another"shark week" again, you know.
Judy: Oh, bummer!
Claire: Aww, I can't. My cousin is here. Another"shark week" again, you know.
Judy: Oh, bummer!
by Sussie Q April 23, 2024

5.5-tuple-3C:
Person who, in relation to the other person, has zero parents, zero grandparents, zero great-grandparents and eleven great-great-grandparents in common.
Person who, in relation to the other person, has zero parents, zero grandparents, zero great-grandparents and eleven great-great-grandparents in common.
My 5.5-tuple-third-cousin is a good person.
by Gerald128 May 15, 2021

