Sister munning 

fitty and very good in bed, tight as a clamp

I really wanna smash sister munning tonight

Sister munning by Penis12354 July 1, 2021

Sister Mom 

A mother to one or more children with a best friend who may or may not also have children. They do not live together but can call on each other at any given point to step in. They have complete confidence that other mom will do as great or better as they can.

"Her sister mom picked up the children and took the kids to practice while she was stuck at work"

Sister Mom by MomInDe May 9, 2022

Sister Lily 

character from a animated TV show named black clover that is a nun and care taker in the clover kingdom her real name is Lily Aquaria sister lily does have admirer name Asta.

"Stop pestering me!" "I-im sorry Asta" "um... I'm sorry" "I'm sorry Asta but I'm everyone's sister"
-Sister Lily

Sister Lily by Mangy fox June 10, 2022

Sister Rodeo 

When you are having sex with a woman doggystyle, you gently slide your thumb into her anus, then say, “I fucked your sister last night.” You then hold on for as long as possible.

Josh was having sex with Brandy, he broke the news of his last week’s infidelity with her sister Britt and had a sister rodeo.

Sister Rodeo by Nipple Knockers July 15, 2022

sister food tax 

if you have a sister you are intended to have her take some food anytime she sees you or you have food.

“hey do you have food”
“Yes”
“Okay give me some, sister food tax”

sister food tax by yomama45 February 3, 2023

sister tax 

when a brother causes dissatisfaction or disappointment towards a sister, so the brother must compensate for such behavior through a requested action from the sister.

mother: "go clean your room"
brother: "i'm not helping you."
sister: "sister tax, you have to clean a quarter of my room"
brother: "fine"

sister tax by hikikohardcore April 2, 2023

Sister Christian 

A disabled individual who utilizes a motorized scooter or motorized wheelchair to get around, thereby 'motoring'.

Individual 1: Check out that Sister Christian rolling out of the Walmart on his little rascal.
Individual 2: Yeah, he's motorin'.

Sister Christian by ThatFuckinGuy257 October 22, 2023