Shut Yo Ass Up, when someone says something you either
1. dont wanna hear.
2. extremely stupid.
<dude> dude, you suck
<guy> your mother sucks
<dude> SYAU!
by NickBeam January 22, 2008
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syau is an abbreviation for “shut yo ass up.” made by Arianna F.
“syau, you sound slow as hell.”
by ibabygirl May 20, 2018
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another way to say “real” or “so true.” it basically means that you’re agreeing with something but more fun.

can also be sarcastic.
“she’s so pretty!” “syau girl!! she’s gorgeous!!”
by lucylicious January 26, 2023
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A sentence invented by the one and only Trick2g syau means "Shut yo ass up"
Enemy: "ur bad"
you: "syau"
by Htennek73 November 24, 2018
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Dude, SYAU before I get the belt and slap your ass with it!
by Minecraft1238 February 3, 2019
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Me: This boy is so ugly..
Her: Girl he's cute! It's not about looks, it's about personality.
Me: Syau.
by Shaya CUH June 24, 2020
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SYAU is an acronym for Step Your Aim Up. Most commonly used in the Call of Duty community as a way to tell a fellow player their aim sucks, or step their game up.
JAMES: Hey Jake 73 hit markers later and that Christmas noon punched you to death.

Jake: CMON MAN WHO THE HELL DOES THAT? THIS GAME IS TERRIBLE. GODDAMN CHEATERS. GIT GUD SCRUBZ!!

James: SYAU Jake, your bad.
by Xcruciate January 23, 2016
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