Soul Sister 

The female equivalent of a blood brother. A best friend of the female persuasion that you consider family. Most times, the feeling is mutual.

Jackie and Rachel are soul sisters. It's like they have the same mother!

Soul Sister by wolfpacleader1986 October 10, 2010

eskimo sister

A woman who has shared a sexual partner with another person and the two are on friendly terms. In today's day and age, the eskimo sibling could be a male or another female...you just never know.

Jenna: "Hey do you see that girl with the tramp stamp? I totally did her last week at Michelle's party."

Brad: "What? I was inside her the night before. Give me a high five. You're my eskimo sister!

eskimo sister by EskimoSibling January 11, 2012

Swing Out Sister 

British band featuring the vocals of Corrine Drewery. Never does the same music genre twice - they like to experiment. Very popular in Japan. Twice the size of average bands which sometimes prevents them from touring. Generally described as Chantese Jazz.

Popular songs:

Now You're Not Here (#1 International Hit)
Breakout
Twilight World

Some Enya fanboy: SOS is ok, but their sound is so synthesized. I like Enya better because she's got such a natural sound.

Swing Out Sister fanboy: You DO know that Enya is 100% synthesized, right? I mean even her vocals are enhanced by computer. She can't even tour because her sound is impossible to create outside of the music studio. On the other hand, SOS has a 10-peice band with all real instruments with one of the best keyboardists in the world.

Swing Out Sister by Alfie The Horndog September 5, 2005

vag sister 

n., a woman who has had sex with the same person you have. In the plural, vag sisters are two women who have had sex with the same man.

This is most likely unintentional. The two women may not be of equal merit physically or mentally; it may therefore be an unpleasant surprise.

Angelina Jolie and Jennifer Aniston are vag sisters.

vag sister by bajingo, bajingo, bajingo May 10, 2009

Younger sister 

plain old parent suck up bitch

me: *does absolutely nothing*

Younger sister: *starts fake crying* Ahhhh mom dad she punched me!

Parents: GROUNDED FOR LIFE YOUNG LADY

Younger sister by Maddgymstar October 12, 2019

your sister a mister lol 

One of the more gritty underground roasts, please use with extreme caution. May cause recipient to go into an anaphylactic shock, epileptic fit and or straight up seizure. Other side effects which have been known to be a consequence of this insult includes full-blown autism or an addition of a chromosome.

Sarah: Your mother is a child-beating, cheap whorewho has achieved nothing manage to trap a man to have a child with her, a massive mistake... you. That mistake is you, you unloved virgin.

Janet: your sister a mister lol

Sarah: *Develops autism and literally fucking dies from her throat closing up*

your sister a mister lol by Joey Gobbless March 24, 2018

National slap your sister day 

July 24 you can slap your sister

Hey its national slap your sister day, go ahead.

National slap your sister day by alpha alpha alpha July 24, 2021