When you choose to ghost your friends to hang out with your cousin. Even if you promised them that you'd be on after school or whatever you were doing outside.
Guy: Sorry guys, I'm going to play with my cousin in a bit.
Friend 1: But you told us we'd play tonight.
Friend 2: He must've gotten the Cousin Syndrome on the way home.
Someone who, in relation to others, has zero parents, zero grandparents, zero great-grandparents, zero great-great-grandparents and twenty-six great-great-great-grandparents in common.
Tredecuple-4C: Person who, in relation to the other person, has zero parents, zero grandparents, zero great-grandparents, zero great-great-grandparents and twenty-six great-great-great-grandparents in common.
My tredecuple-fourth-cousin is a good person.
Ninth-cousin-five-times-removed (9C5R).
My ninth-cousin-5X-removed is a good person.
Third-cousin-once-removed (3C1R).
My third-cousin-1X-removed is a good person.
1. The spouse of one's grandparent's sibling's child.
2. The child of one's grandparent-in-law's sibling.
My first cousin-pibling-in-law is a good person.
Fourth-cousin-once-removed (4C1R).
My fourth-cousin-1X-removed is a good person.