May 15 - Oldest Sibling Day

I do to much shit for these children so we oldest siblings get a holiday too. Shout out to that one tweet for the idea.
Youngest sibling- "Fuck you."
Oldest Sibling- "that's rude, judging its May 15 - Oldest Sibling Day"
by yourbasicbadbitch May 14, 2020
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toxic oldest sister

When ur older sister becomes an alcoholic/drug addict who is responsible for the collapse of their own social life and cant take care of their own kid because theyre too busy ruining friendships and familial bonds because they block you on social media and dont visit anymore :)
ahahaha my toxic oldest sister blocked my teenage sister on facebook today!
by ch!lly October 08, 2021
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The Oldest Book in The Tree

By Throbert Buster

Meaning the oldest trick in the book, but amidst a dreary morning, a lazy rising sun, a distinguished gentlemen by the name of Throbert Buster, twixt with his confusion, exclaims, "The Oldest Book in The Tree!"
Thats literally The Oldest Book in The Tree bro.
by Ignacio DriverbeerLluchalatore February 19, 2025
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Just punch the oldest person on you class( not the teacher tho you don’t wanna get a referral do you?)
Classmate: hey buddy
Me:hey
Me:*punches*
Classmate: what the hell is wrong with you?
Me: sorry buddy it’s National punch the oldest person on your class day 😬
by VSCO girl forever October 30, 2019
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Top five oldest year 7s

Anyone above the age of -6.99
Top five oldest year 7s are very very young
by Aliminatory October 26, 2022
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