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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?"
sibling by Loxi July 22, 2009
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
Sibling by Smiley Unicorn May 16, 2017
A person who came from the same parents as you, it can be a girl or a boy, older or younger, it doesn't matter. They're like your best friends, but at the same time, they are obnoxious assholes whose purpose is to ruin your life. Younger siblings tend to be spoiled brats that constantly annoy you, but older siblings tend to make you feel like shit.

But you still love them ;)
Me: May i please have the laptop?
My brother: No
Me: Why? I need to do my homework on there!
My brother: Fuck off, i'm playing CS:GO
Me: Ugh, siblings are a pain in the ass... But i still love you anyways ^_^
Sibling by carafa0123 July 17, 2016
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
Sibling by waffles.and.weed January 9, 2015
Sibling by Stan April 12, 2006
A person in your family sent from god to punish you for your misdeeds and wrongdoings.
My siblings are really f****** annoying.
Sibling by TheWarBroker November 16, 2018