SIBC 

sitting in bed crying,

person 1: i heard she was SIBC the entire night!
person 2: doesn’t that mean sitting in bed crying?
person 1: yeah

SIBC by woo_a_loner September 16, 2022

sibcrepancy 

When there is a very large discrepancy among siblings in hotness. Usually used when one sibling is very attractive, and the other one has been beaten severely with the ugly stick.

Minnix: God damn Alisha is so hot- I think she is the hottest bartender in the whole city.

Matt: Have you met her sister Jen?

Minnix: No- but I hope I do soon, thank god there are two of them...

Matt: Not so fast- there is some serious sibcrepancy there- Jen looks like someone punched her in the mouth with a fistfull of shit.

Minnix: Oh man, that's terrible-that means you aren't guaranteed to have a good looking kid with Alisha. Her stock just plummeted. How depressing.

sibcrepancy by schmuckaneers May 13, 2009

sibcest 

Incest between siblings in fanfiction. Siblings + incest = sibcest.

For example Éowyn and Éomer in lotr.

sibcest by brat July 3, 2004

sibcon 

someone who is romantically/sexually invested in their sibling. gender neutral for someone who has a "brother/sister complex".

did you hear about @twitteruser? they're a sibcon!

sibcon by alphonse enjoyer March 3, 2023

sibconist 

A sibconist is an enthusiast of movies / series featuring consang, i.e. consanguinamorous relationships; which in fandom is described as sibcon, a combination of siscon (Sister complex) & brocon (Brother complex) or in more erotic imagery as fauxcest.

she's certainly a sibconist if she can't get enough of Game of Thrones

sibconist by Bobbystrurrew July 11, 2023

Sibchi 

Sibchi is a gender-neutral term to describe the children of my sibling, a compound of SIBlings and CHIldren.

My sibchis are each gender non-conforming. One is transitioning to female, the other is bisexual

Sibchi by pamelapolis July 16, 2024

sibcest 

It uses to describe the deep,pure,bound by blood beautiful romantic love between brother & sister(s) and/or sister(s) & sister(s)

No matter what, She and her brother are so in sibcest, that they've got married.

sibcest by ßß August 30, 2025