A creature sent to earth to remind you that your parents are still having sex.
"Dude, congrats on your new sibling!"
"Man, don't remind me! All that means is my parents had sex at least 9 months ago."
by thedifinerofdefinitions January 12, 2015

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Siblings are people who you might always be mad at or you might love them all the time ( rarely ). They are related to you because you have the same person who gave birth to you or adopted. They can be horrible to each other and they can hate each other..that's fine.
I love his sister,not him.
WAIT..YOU'RE LESBIAN AND YOU LOVE HIS SIBLING?!?!!
No, I'm pansexual and I love his sibling
by Smiley Unicorn May 16, 2017

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(noun)

Reminders your parents had a lot of sex...
Why do I have siblings???

Because... You parents liked sex.
by TheBubbies101 August 27, 2014

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A younger brother or sister.
by Stan October 10, 2003

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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 November 29, 2015

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Someone who came out of the same vagina as you, and can either be a boy or a girl.
my sibling is playing my video games on my Xbox.
by Ilisten2Metal October 16, 2014

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a demon that make you want to rip your own ear off and shove it up their fucking ass
My goddamn sibling is running around the house and since she weighs 400 pounds the whole house is shaking
by waffles.and.weed January 09, 2015

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