big sister 

a torture device from the depths of hell

guy: hey u got a big sister
guy 2: yes i do!!! she sucks
guy: obviously for crying out loud

big sister by Stupid Af July 4, 2021

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

Big sister 

A slave of her parents family and younger siblings (particularly brothers)

I don't have a big sister

Big sister by Hello-553669 April 19, 2025

Big sister 

glorified slave of their younger sibling (especially if it's a brother)/parents

I don't have a big sister

Big sister by Hello-553669 April 19, 2025

Big sister 

So-called 'second mother'; glorified slave of their younger sibling (especially if it's a brother)/parents

I don't have a big sister

Big sister by Hello-553669 April 19, 2025

Big sister

Someone you would die for.

I love my Big Sister more than anyone.

Big sister by Zbrolyplayer April 9, 2026

Big Sister Milk 

Fresh arousing milk produced from the finest 2D onee-chan's oppai

My onee-chan gave me a sip of her big sister milk!

Big Sister Milk by Your Secret Urges August 12, 2018