What is Quadruple-second-cousin?

Child of their mother’s double-first cousin with their father’s double-first cousin.

My quadruple-second cousin is a good person.

Quadruple-second-cousin - meme gif

Quadruple-2C:
Person who, in relation to the other person, has zero parents, zero grandparents and eight great-grandparents in common.

My quadruple-second-cousin is a good person.