cousin fucker

a cousin fucker is someone who fucks their cousin

You:Dora the explorer is a cousin fucker.
Someone: With Diego?...
You:Yeah...

first cousin-pibling

Parent's first cousin.

My first cousin-pibling is a good person.

sesquaple-second-cousin

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

My sesquaple-second-cousin is a good person.

great-cousin-pibling

Grandparent's first cousin.

My great-cousin-pibling is a good person.

double-first cousin-niece

Daughter of their maternal first cousin with the paternal first cousin or double-first cousin’s daughter.

My double-first cousin-niece is a good person.