8
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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9
by Stan October 10, 2003
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10
(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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11
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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12
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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13
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.'
by I Love Grimbling April 13, 2008
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14
Little monsters that invade privacy and rob your stuff.
I strangled all of my siblings.
via giphy
by fandomcentral September 10, 2016
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