full sibling

Person who has the same two parents in common with someone.

My full sibling is a good person.

by Mr. Jacov November 23, 2019

half-sibling-in-law

Spouse's half-sibling or half-sibling's spouse.

My half-sibling-in-law is a good person.

by Rwopazaq November 24, 2019

double-sibling-in-law

Sibling’s spouse and spouse’s sibling at the same time.

My double-sibling-in-law is a good person.

by Rwopazaq November 24, 2019

co-sibling-in-law

The spouse of one's spouse's sibling.

My co-sibling-in-law is a good person.

by Elivaldeq November 24, 2019

Cousinary Siblings

Cousins in a brother and sister relationship.

Cerissa P. Terminology

Cousinary Siblings- cousins that are best friends and have similarities. Resemble each other, physical similarities, similar personalities

by Cerissa P. Terminology February 29, 2020

forced sibling

A sibling under your age who you didn’t ask for to be born or your parents had without asking you.

Melissa: Kaylee has a forced sibling, how sad.
Jessica: I bet her parents don't care about her anymore.

by Yuhh :< June 11, 2020

exclusively simping

Not talking but off limits to everyone and seeing where things go.

Will is exclusively simping for Soley.

by whorewecum June 18, 2020