A sister who by blood is a sibling, but happens to play the role of Mother figure as well. (Sibling Co-Parenting)
This can occur for a variety of reasons such as cultural background, parents work schedules or simply having a large family.
This can occur for a variety of reasons such as cultural background, parents work schedules or simply having a large family.
Example 1: My sister-mom has helped me raise my grades, helped me focus on my future and is also my best friend.
Example 2: Teacher - "Hey, is that your mom over there? Is she picking you up from school today?"
Student: "Oh, no, that's my sister-mom."
Teacher: *confused look*
Student: "Well, she is my sister, but she also acts like my mom"
Example 2: Teacher - "Hey, is that your mom over there? Is she picking you up from school today?"
Student: "Oh, no, that's my sister-mom."
Teacher: *confused look*
Student: "Well, she is my sister, but she also acts like my mom"
by WordWatch January 20, 2018
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.
by MomInDe May 10, 2022
Jenny is coming to the party and she is bringing her sister-mom. I saw Chris shopping with his sister-mom.
by jillyjillz April 14, 2011
When your dad has sex with a woman and said woman has a girl for a child. Then the dad fucks the daughter and you are born. Motha fuckin sista mom
by zeilgarsiulgfiSDoiuSEibugsEigu January 29, 2012
Jeff: what you doing today bro?
Bro: What do you think it’s National Threesome with your Sister and Mom day
Bro: What do you think it’s National Threesome with your Sister and Mom day
by Hikari 𓆏#696 October 14, 2021