Sisterhen 

Sister hens are found in the step chickens cult.

Alaina is a sisterhen in the step chickens cult.

Sisterhen by Stepchickensforlife May 18, 2020

Sisterection 

Becoming aroused from contact, verbal or physical, from one's female sibling.

I couldn't concentrate on my maths homework, as I had a sisterection from the family gathering.

Sisterection by Moses "Sandals" Jackson November 13, 2010

sisterectomy 

The act of removing a sister from your life, either physically or metaphorically. First used in the Simpsons episode "My Sister, My Sitter".

Simpson? Look, we've already been down there tonight for a sisterectomy, a case of severe butt rot, and a leprechaun fight. How dumb do you think we are?

sisterectomy by ubersmith May 17, 2016

sisterhood 

A bond between two or more girls, not always related by blood. They always tell the truth, honor each other, and love each other like sisters.

I am so excited to be a part of this sisterhood.

sisterhood by Brittany K. Gardner October 16, 2003

SisterZone 

a relationship status, like the Brotherzone, but for chicks. it is sorta like hell, where you toe nails and catch to flames. Once in the sisterzone you can never escape.

Me: Hey tori, you are like a sister to me.
Her: Did you just SisterZone me?

SisterZone by FuglyBugly May 10, 2015

sintervention

(n.) when an individual or group of persons intervene in the social life of their friend or colleague with the intention to introduce so-called "sinful" activities, including drugs, alcohol, tobacco and various promiscuous behaviors.

You grew up in Boulder and you've never smoked weed? Time to stage a sintervention!

sintervention by poison_ivy February 23, 2011

Sistermance 

The female equivalent of bromance. Love and affection shared by two straight females.

Not to be confused with shoujo-ai, yuri, or femslash.

Jamie: "Have you seen Firefly? Kaylee and Inara have the cutest sistermance."
Sam: "Agreed! Mal and Wash's bromance is awesome, too."

Sistermance by Skydive Off Isengard August 11, 2014