cousin sister 

its when you are a redneck and your uncle mom and aunt dad have a daughter

i had sex with my cousin sister last night. my aunt dad got dibs on tonight.

cousin sister by ziptied chevy June 12, 2018

Sister cousin 

Female cousin

Sister cousin is the nicest I love her sissy

Sister cousin by 459395 April 3, 2023

sister-cousin 

a sister-cousin is when your baby's daddy has a child with your sister-- your baby and her baby are sister-cousins.

"im going to the movies tonight with my sister-cousin"

sister-cousin by scrapwebb January 6, 2012

Sister Cousin (SC)

Female heterosexual life mates.

Sister Cousin (SC) is a Heterosexual female life mate.

Sister Cousin (SC) by 802GlobeTrotter April 5, 2019

Sister-Cousin 

Your female cousin whom you are so close with that your relationship reminds you of a loving pair of sisters.

That’s not just my cousin. That is my sister-cousin.

Sister-Cousin by John Jacob Allen Smith March 5, 2024

sisters cousin 

It's not my cousin, it's my sister's cousin so we can fuck

When me and my sisters cousin are scrawgin in the back seat it's legal since she ain't my cousin, she's my sister's cousin

sisters cousin by Rustybug26 April 22, 2018

sester-fourth-cousin

Sester-4C: Person who, in relation to the other person, has zero parents, zero grandparents, zero great-grandparents, zero great-great-grandparents and five great-great-great-grandparents in common.

My sester-fourth-cousin is a good person.

sester-fourth-cousin by ABGR June 9, 2021