stay in school, from peaches song "fuck the pain away"
sis iud stay in school cuz it's the best
by peter brook July 11, 2008
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A term often used when talking about mental health treatment meaning suicidal ideation or suicidal thoughts
by Bitchbotch June 22, 2019
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SI units are the best, man. Inches suck.
by AnActualDefinition March 12, 2018
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AS of SI is a clash of clans player that is like a bucket of marshmallows and is as cute as the goji meow stickers he loves. He is commonly referred to as the greatest townhall 9 in CoC. Jew know what I'm saying? He's fiercely loyal to his clan and is irreplaceable. When he's not smashing war bases, he's also the fearless leader of AS123. His mates are lucky to have him.
He pulled an AS of SI and nailed all the war bases. What a great player.
by JiggleB January 19, 2017
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Typical abbreviation for the Saying "Slaves in shackles", Racist.
"Don't do that sis" (Don't do that, slave in shackles" "are you a sis?" (Are you a slave in shackles?)
by Educational Institutions January 7, 2022
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A suffix added to any noun meant to accentuate the word in the sentence. Manages to get very annoying.
"Let's go and get dome drinksies."

"Crazy wetness in the poolsies!"
by The Allergen June 27, 2005
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