first cousin-aunt

Parent's female first cousin.

My first cousin-aunt is a good person.

Alabamas Cousin Treatment

The act of dickin' down your first cousin.

"Dude, I just gave my cousin the alabamas cousin treatment!"

sesqui-first cousin-uncle

Son of their grandparent’s half-sibling with the other grandparent’s full sibling.

My sesqui-first cousin-uncle is a good person.

Cousin superiority

The cousins that are superior

Gianna, bella and henri hold cousin superiority

Belly Cousin

Male friend who have had sex with the same female. Similar to "tunnel buddy"

Mike: I had sex with Alyssa last night.

Jon: Oh, shit! I used to hit that also! We're belly cousins!

Both: *high five

sixth-cousin-8X-removed

Sixth-cousin-eight-times-removed (6C8R).

My sixth-cousin-8X-removed is a good person.

irregular-triple-fourth-cousin

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

Irregular-triple-fourth-cousin.