Grandma Sister

The most disgusting thing people in Alabama can do, when your grandma is also your sister

man i got with grandma sister the other day, i love her old pussy

by alabamainsest August 2, 2020

Super sister

A girl that is apart of your “family” whom is a step sister but also a sister in law

“Alexis is dating Chris and they’re getting married, but now their parents are dating”
“DAMN Alexis a super sister”

by GoddessWhore June 4, 2021

Head sister

When you and your best friend get scooped by 2 dudes at 3 AM and yall don’t have anywhere to go so you guys pair up in the car (front seats and back seats) and give suck dick together

“Omg that makes us head sisters!”

by boh bhiiii May 22, 2019

swisher sister

Girls that have given the same guy a bj

They both dated him and sucked his dick. They're swisher sisters

by Justkidden August 8, 2017

sister johosph

refering to ancient times of an old nun, capable of jacking off her husbands small bald genatalia, but having ones husband stolen from sibling, aka mean catholic skool bitch: see steve guinta

god damm why does my teacher have to be such a sister johosph

by steven guinta (lmfao travis...head ache, u kno ) October 15, 2003

Sister Mom

A mother to one or more children with a best friend who may or may not also have children. They do not live together but can call on each other at any given point to step in. They have complete confidence that other mom will do as great or better as they can.

"Her sister mom picked up the children and took the kids to practice while she was stuck at work"

by MomInDe May 9, 2022

sister-in-law

1. The wife of one's brother.
2. The sister of one's spouse.

My sister-in-law is a good person.

by Elivaldeq November 24, 2019