Pretty much the Brother Zone and Sister Zone mashed into one convienient term.
Jen told me she liked me like a brother. How the fuck do you get out of the Sibling Zone?
by Mofos in the Zone November 5, 2009
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In which two individuals do not share the same mother or father but rather connected through the same sibling.
Can’t wait to hang out with my quarter siblings!
by ThtCoolKid November 17, 2019
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A general term used for a man and a woman who share or have shared sexual partner(s) of either gender
As Tina tells Ron about how bad Tyrone was in bed, Ron responds, "My experience was quite the opposite."
They giggled into the night about being eskimo siblings.
by 2tyronefers April 13, 2014
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1. what happens when the older sibling beats up the younger one because it is a culturally accepted ritual

2. when older siblings buy booze for younger siblings and get them stuff that is otherwise illegal.

3. when older siblings are worshipped because they're cool and tell their younger siblings about life and how to get girls, etc.

4. the best bond in life
1. 'Ow i have so many bruises from our latest sesh of sibling bonding!' -younger sibling

2. "Ye-yeahh i was enjoying some sibling bonding with my older sister and she gave me a bottle of smirnoff and this funky herbal stuff.'

3. 'My little bro loves me because we always have sibling bonding and i tell him about stuff that our parents wouldn't."

4. 'I love sibling bonding.....my life is complete now.' -both parties involved in SB.
by bossyoldersib November 4, 2010
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A brother or sister with whom one has incestuous relations.
Travis: Did you see Bobby Sue and Billy Ray lookin' at each other like that? It was really weird.
Clint: P'shaw, don't you know, they're Siblings with Benefits! Stay away from their trailer when their mama's workin' at the Tyson factory on Saturday nights, I tell you.
by ClimbingTheLog June 12, 2008
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The feeling of obligation, loyalty, and affection, shared between persons who traditionally but not always share one or more parents, despite the terrible things they did to one another as children and sometimes to one another as adults.
Clara and Tony feel sibling love for Libby, even though, during childhood, Tony and Clara would use a television remote to convince Libby that she was invisible and mute.
by HappyWeddingLibby May 18, 2019
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