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

National Bully your sibling day

National Bully your sibling (s) day is April 27th have fun with this.

April 27th is national bully your sibling day. You can bully your siblings on this date with no permission needed.

by KassWritesDefinitions February 26, 2023