Big Sister 

A big sister is a little sister that has grown up, and is no longer capable of collecting Adam from corpses. They are in a deep sea diver suit, just like a Big Daddy. They are able to use Plasmids, and have a large needle to take Adam and transfer it into themselves.

Eleanor: If I can survive, I’ll need to become like you. I’ll need to become a big sister.

Big Sister by n_u_m_l_o_k September 29, 2020

his_sister_s0 

A tiktoker with almost 400 followers, smart, and really nice.

1- Who is that Tiktoker?
2- oh it’s just his_sister_s0!

his_sister_s0 by anonymous December 26, 2020

Shaft sister 

When two or more girls have hooked up with the same guy

Girl 1: "I hooked uo with Brian last week"
Girl 2: "So did I! Now we are shaft sisters girll"
Girl 1: "PERIODT"

Shaft sister by badbitch123456 January 30, 2021

The Sister Fiiiisters 

A legendary trio of lionhearted warriors, who used to travel the world putting their fists into anything evil in this world. Many a deadly foes have been done in by their fists. They also loved to partake in the occasional panda gang-bangs

Hide your sisters cause we are gonna Fist 'errr, for we are The Sister Fiiiisters.

The Sister Fiiiisters by LilNiggle February 24, 2021

Retrosettes sister band 

A pub band from manchester england
Fronted by armecia Michelle harris. They were featured in the opening scenes of Paolo sorrentinos 2016 film entitled. Youth
This band primarily performs covers. Of other bands songs.

Retrosettes sister band covered candy stations "you got the love"in the opening scenes of Paolo. Sorrentinos film entitled youth.

Retrosettes sister band by 4realazitgits March 28, 2021

aep_sister 

A popular after effects editor

Aep_sister is a good editor.

aep_sister by Um yuh April 25, 2021

courtesy sister 

A friend(no 'benefits') who's so close she's like a sister, or just is the mother of someone who calls you Uncle. (could be a former sexual partner, but who is only a friend now)

How many siblings do you have?

Well, I have 2 brothers, 2 sisters from my mom, & a half brother from my dad, & a courtesy sister I stilll keep in touch with.

courtesy sister by cyberpope67,BC,Canada May 2, 2021