shit sisters 

Two people shit into the same toilet bowl

When the toilet was blocked, Kirsty and Alan had no choice but to become Shit Sisters

shit sisters by batshitcray September 20, 2016

shit sister

every family has one....the less favourite or popular or successful sibling. Think of Danni Minogue compared to Kylie. Danni is the shit sister. Could also, be the second favourite son, if you have a brother.

Danni is the shit sister to Kylie.

shit sister by HomeBrand August 30, 2021

Shit sister

I have a shit sister, means to have a sister that's like a stranger to you.

Me: I have a Shit sister
Friend: oh damn want a new one??

Shit sister by Nellie45 November 22, 2022

Well, shit in my mouth and call me your sister 

An sarcastic exclamation that can be used in a variety of ways. Usually used to to emphasize how glaringly obvious something that has been said is.

A: I had to go to school yesterday.
B: Well, shit in my mouth and call me your sister - student's going to school? Really?

Well, shit in my mouth and call me your sister by DarkLite January 19, 2007