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Acronym for Sort Yer Own Shit.
This popular metaphor applies in AFL (Australian Rules football) and in everyday life.
SYOS is used to refute shoddy logic by gently pointing out the shortcomings in some idiot's imitation of same.

First used in 2011, it has rapidly captured the public imagination and is now copyrighted (©).
Feej: Your mob are losers!

Jed: SYOS, twelfthmond.
by the tomato hippy © September 16, 2012
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an acronym meaning "See You Online Soon". Similiar to ttyl "Talk To You Later" however syos is used when saying goodbye to someone whom you only talk to online.

Person1: Ok i have to go to work.
Person2: Alright it was fun chatting with you. syos!
Person1: Yup syos!

by Deroc06 April 04, 2009
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sneak your own. similar to bring your own, reffering to sneaking alcohol to a party.
Mate theres a party at my friends house this weekend, im afraid its SYO though.
by MowaTheStar November 15, 2013
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