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

by Stupid Af July 4, 2021

Big Sisters & Big Brothers

Organizations that pair young kids with older "brothers" & "sisters". They spend quality time together & it makes up for not having a Mom or Dad. Great for youngsters!

{Big Sisters & Big Brothers are in practically every town & city nationwide.

by Starchylde May 21, 2016

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!

by Your Secret Urges August 12, 2018

Big Sister Syndrome

When you have always been the one to pick on your siblings with no consequences... and therefore as an adult shamelessly poke at others even when you shouldn’t. Specially when an adult female poked fun and teases others because they never had an older sibling to put them in their place.

My girlfriend won’t stop trying to tickle me when we cuddle and finds it funny. It’s like she has big sister syndrome. Little does she know what’s coming!

by Bigsistersofurban February 9, 2021

National big sister day

A day dedicated to our big sisters, because they helped raise us too!!!

I have to buy my sister a gift for National Big Sister Day

by Bellerrrrrr December 3, 2019

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

by Hello-553669 April 19, 2025

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.

by n_u_m_l_o_k September 29, 2020