Middle siblings are the least loved and most overlooked siblings. They are not the first baby or the actual baby of the family so are often forgotten. They are determined and have learnt a lot, though. They are the toughest and mentally strong as they have been forced to be. They often feel unloved and like an outcast. No one understands them. People mistake middle children for having anger issues but they really just need more love and don't know how to show it. Parents overlook all of their achievements so they become reckless and don't care what others think about them. Words are a middle sibling's worst weapon. They can make you cry or make you so angry but they are actually just jealous. They are jealous of those who haven't suffered and of those who have their parents, undying love. They also have the most personality, though. They stand out in any way they can in the hope someone sees them. They also have a lot of friends who are like family. Despite all this middle siblings are always the most successful and rich. They often have many relationships but may find it hard to settle down with someone. They work extremely hard and often are the most rewarded in life. They may do this to make there parents proud, they may do it for them.
by chocbabe October 9, 2021

by -KTG February 14, 2008

One adult child whose siblings allow, by deferment, silence, or proximity, to assume and shoulder the predominant responsibilities of caring for an aging parent.
A sibling sucker with no time to call their own, can grow to be an angry angel.
A sibling sucker is usually performing one of the most difficult and thankless jobs on the planet.
A sibling sucker spares brothers and/or sisters of their equal responsibility which might "God forbid" interrupt their busy lives.
A sibling suckercan be one whose halo has fallen a few inches to become a noose.
A sibling sucker is usually performing one of the most difficult and thankless jobs on the planet.
A sibling sucker spares brothers and/or sisters of their equal responsibility which might "God forbid" interrupt their busy lives.
A sibling suckercan be one whose halo has fallen a few inches to become a noose.
by Catholic Devil May 4, 2009

A person on facebook who adds everyone they know as siblings. They usually have over 40 siblings and relatives listed.
Jen: Duuudee did you see Jane's facebook page? She has like fifty siblings listed and I dont even think she has ten real friends.
Bob: Whatta sibling whore!
Bob: Whatta sibling whore!
by wadduup April 12, 2011

From the infinitive 'to sible' (pronounced 'sibble'), meaning to perform some form of sexual act with another persons brother or sister (preferably younger for greater novelty value...though not TOO much younger). For clarity in use, the given example would mean that to sible 'her', would be to sleep with 'her' sibling.
'Dude, I would totally sible her...soon as her younger sister's street legal of course.'
'For sure dude! I'd give her the sibling of a lifetime.'
'For sure dude! I'd give her the sibling of a lifetime.'
by I Love Grimbling April 13, 2008

To become shit siblings, two people must each first take a shit, collect the shit and keep it in typical shit-form and then freeze the shits. After the shits are frozen thoroughly, the two parties will exchange their frozen shits, stuff their prospective shit-siblings' shit into their own asses and proceed to reheat and then re-excrete the the pre-fab log. They are now officially shit-siblings.
Who cares if you're blood brothers? Me and So-And-So are shit-siblings; way cooler, and way shittier. Ain't that some shit?!!!!
by wilbuey buhg August 25, 2010

Alex: My dumbass dads getting married next weekend and then I’ll have a new step sibling and dude she fuckin hot as hell and she’s got some great biscuits and tits
Riley: damn dude ... can I date her then?
Riley: damn dude ... can I date her then?
by Pussyfucker2020 July 1, 2019
