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surrogate older sibling

A person who fulfills the vacancy to be the surrogate older sibling in a family where the oldest child has left home whilst the younger sibling(s) are still too young to move out. Such vacancies are commonly found on the Happy Family sticker in the rear windshield of the family car. This role often involves providing guidance, support, and companionship in the absence of the biological older sibling.
After my older brother left home for college, someone became the surrogate older sibling, helping me navigate school and life at home.
by Emotional Cruiser September 29, 2025
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Sibling Send Off

Whenever a sibling gets married for the second time (it is only for second marriages with the lore that this is the second chance), he/she usually gets into a ‘bachelorette’ type of an event with another married sibling of the opposite sex. Mostly common among brother-sister relationships and sister-sister relationships with an age gap of 2 years or more.

This is usually a small trip where both siblings spend the day doing the activities preferred by the sibling getting married. This is followed by a night of drinks and sharing secrets. The send off part comes in the end when the sibling who is getting married exhibits lingerie, shares secrets and engages in mild affectionate making out. This is different than a sexual encounter with a partner. Penetration is usually rare.

Prominent across south east asian countries, and some parts of Europe, its supposed to bring in good-luck and is a fun way of sending off the sibling.

In many cultures, there is a parent send off ritual as well which exists only between mothers and sons.
Hey sister….are we supposed to do the Sibling Send Off (SSO) in town or we travel?

Hey bro…I will be needing lot of gifts when we do the Sibling Send Off (SSO) next week. Don’t worry, I won’t tell mom.
by Factspitterpro June 26, 2024
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sibling in outlaw

The sibling of a romantic partner you are not married by law to
"Now that I'm in a relationship with Amanda, Jerry is my sibling in outlaw"
"I'm going to commit some crime with my sibling in outlaw next weekend"
by totoroxi August 2, 2024
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three-quarter-sibling

1- Child of mother and of uncle (father's brother) simultaneously.
2- Child of father and of aunt (mother's sister) simultaneously.
3- Cousin and half-sibling simultaneously.
Three-quarter-sibling.
by Chupite November 20, 2024
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Sibling Hate club

A hate club that is against your siblings
Person : have you heard of the "sibling hate club" ?
Me : yes I made it
by MikanTsumikiCosplayer October 16, 2021
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Liquid sibling

Your liquid sibling is trying to scare everybody again. He/she doesnthave the heart to say/do some of that shit in real life, but will show up in a video game as a video game character trying to fight you.
by Solid Mantis October 7, 2020
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sibling

My sibling is a good person.
by ZURB981634 February 10, 2022
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