A brother or sister.
A being with whom you share parents, whose sole purpose is to destroy your life.
In general, younger siblings are slightly more annoying than older ones, although in general older siblings are meaner and stronger so beat up the younger one.
by Goldfish United! February 26, 2009
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Hell in a human form. Unfortunately, they related to you.
My younger sibling drew a self portrait of himself. With lipstick. All over my algebra homework.
by Captain Lieutenant October 10, 2015
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One's exact opposite, created by someone's parents to torture him/her until death.
by Ausie Badass December 8, 2003
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Tony is my sibling. He bugs the heck out of me, but I love him so much.
by Mystic_Snowfang July 11, 2008
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The less commonly used term for brothers or sisters.

They are often identified with a loud voice and tattletale incidents. Pinching is their main defensive action.

Siblings are often called annoying by their older and smarter siblings.
"Mommy, he took my toy!"
"Don't be such a sibling!"
by TheEve December 6, 2011
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a demonic soul sent from hell who's main porpose is to turture you for the rest of your life.
(pregnant) mom: you want a sibling?
kid: NNNNNOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO!
by morgasa March 22, 2018
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A child born of your mother's womb who is used as a unit of comparison in the family.
Mom: (Chiding) "Your brother sent me flowers for my birthday. Why can't you be more like him?"

Steve: "Ah, Mom! Can I help it if my sibling has more money to waste than me?"
by Loxi July 22, 2009
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