SIA
Sluts in action
Guy 1: I had sex with ____
Guy 2: I did too... thats awk.
Guy 1: Shes a SIA!
by Britney Canner October 16, 2010

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Top Definition
sia
A suffix used mostly by Singaporeans and Malaysians at the end of sentences or exclamations to add emphasis or gravity.

Mostly used to highlight something and proclaim shock, respect or to garner agreement.

Informal, and used mostly by gangsters, youngsters or the less educated.
7-Eleven is selling Tiger Beer at 50% discount exclusively for the World Cup season! Faster go buy, so cheap sia!

Did you see Jack's new girlfriend? Damn hot sia!

Check out his track record! That's not even humanely possible sia!
by Slashbyte June 27, 2010

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Sia
Sia is an Australian-born singer/songwriter whose 2014 hit 'Chandelier' topped the charts. She is also known for the artist who no longer shows their face during talk shows, interviews, performances etc
"Hey did you hear about the new music video Sia put up?"
by _pineapples_ March 29, 2015

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sia
A synonym for "cya" mostly used by Sia's fans. It was made popular because of how close the pronunciation of both terms sound.
I have to go now, sia!
by asentrix March 29, 2016

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SIA
Swaggerific Intense Athlete; an intense athlete such as a runner or a gymnast who also has some serious swag.
"dayummm she a serious SIA. I can tell by that body"
by SIA1 August 25, 2011

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SIA
Singapore International Airlines.
The premium airline in Asia.

http://en.wikipedia.org/wiki/Singapore_Airlines
Hey! Im flying to Canada on SIA!
by melvinlow September 22, 2008

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SIA
Sorry in advance
I'll be off hiking this weekend, while you're tethered to your computer for work. SIA if I can't respond to your emails quick enough.
by rich New Yorkers January 25, 2017

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Sia
Sia is a greek word that meaning love. Often used by malaysian people tu show their love to each other.
Man : awak busy ke tu?
Jaa : manada lah sia
by Saitama cute January 07, 2017

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