Sister Jackie 

A raging cunt that destroys kids and/or eats them for sport

me: God Lauren is such a sister jackie, those kids must hate her.

Sister Jackie by peacelovejuice October 6, 2016

Sister Moon 

She is a character from the show Adventure Time and is first introduced in the mini-series "Stakes". The Moon, also called Sister Moon, is one of the 5 vampire's in the Vampire king's court.

To put it simply, she is the best vampire to ever exist in the world of monsters in all universes. Even Lady Dimitrescu's got nothing on her. Maybe. I'm not sure.

Sister moon.
"Die like pigs!"

Sister Moon by SuspiciouslySweetSubstance July 7, 2021

Sister Vibes

When you see a beautiful women (typically blonde) or something wholesome and fashionable in regards to being sexually attracted to your sister.

Blonde girls give me sister vibes

Sister Vibes by anonymous August 18, 2021

Sister Lulu

A good-natured nickname used for younger sisters.

Oh, Sister Lulu (getting your sister's attention).

Sister Lulu by DrakeDrakeIV June 7, 2009

Sister Squad 

An iconic group of 4 who make youtube videos together and have a lot of fans. The group contains of YouTubers Emma chamberlain, the Dolan Twins, and James Charles.

Me: did you see the new Dolan Twins video?

You: yeah! It was a sister squad video this week!

Sister Squad by clutchboys January 18, 2019

Sister-in-law 

A conceited stupid fuck with two idiotic offspring that still lick the windows at the bowling alley and get everyone and themselves sick. This is also the same moron that told her suicidal husband to put a bag over his head because he found another man’s cock in his wife’s mouth. It’s the dumbass you pray gets into a really really really bad accident.

I hope my sister-in-law gets eaten by a polar bear.

Sister-in-law by Phaedrus3rd August 19, 2019

Sister Karly 

A radically moral person in a college dorm atmosphere.

You don't drink? What a Sister Karly!

Sister Karly by emaleelee January 13, 2008