National slap your siblings day

December 18th its National slap your siblings day whether you have one sibling or 5 and your parents can get mad about it!

Mom:WHY DID YOU SLAP *insert siblings name*

Child: It's December 18th, National slap your siblings day

Mom: What-

by Gachafro December 6, 2021

siblingist

To be unfair or bias against a certain sibling.

Your being siblingist against your brother/sister.

by lannan.7 October 15, 2019

Sibling Ribaldry

When brothers and sisters are too close in inappropriate ways.

Terrance Magnumb had a case where a brother and sister loved each just too much and it created a sibling ribaldry.
(Excerpt from the book, Magnumb, Private eye)

by Magnumb,Private Eye February 12, 2022

Gallman siblings

The 2 awesomest people in the world!

Chris: Do you know the Gallman Siblings?
Tielor:F*ck yeah i do! Their the 2 awesomest people in the world!

by jbaby04 September 24, 2011

New sibling syndrome

When children who have recently acquired a younger sibling feel so excluded that they pretend the new member of the family simply doesn't exist.

Mary: "Who is that?" (motions to John's younger sibling)
John: "What are you talking about? I don't see anything."
Mary: "Oh John, I forgot you are still suffering from new sibling syndrome."

by yepyepyepyepyepyepyep February 2, 2014

bridge sibling

Your half sibling's, half sibling. When a child's parents seperate and go on to have other children, the relationship between those subsequent siblings. The original child acts as a 'bridge' between the two families.

This is Derek, my half-sister Mary's half brother. Mary and I share the same mother while Mary and Derek share the same father, he is my bridge sibling.

by GoJump April 25, 2016

three-quarter-sibling

Child of a person's father with that same person's maternal aunt or child of a person's mother with that same person's paternal uncle.

My three-quarter-sibling is a good person.

by Mr. Jacov November 23, 2019