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Social Media Ghost -
A person who does not use social media (Facebook , Twitter , Instagram etc...) to communicate.
I tried finding her on facebook and twitter but she was no where to be found. She must be a smg
by CFOD November 17, 2016
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Santi was trying to be funny and told me to SMG, but it was just perverted, weird, and frankly, insulting.
by cd16 April 07, 2014
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In the world of BMW autos, it means "sequential M gearbox"
The 2003 BMW M3 has SMG, which is arguably an improvement in the traditional 5 speed way of shifting
by Leandro October 30, 2004
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An acronym for so much game.

When a man is wheelin' a lot of biddies (chicks) he has so much game: SMG.

Also if you're getting a lot of action, you have so much game: SMG.
Man 1: MAN! JOEL SIGGELKOW HAS SMG!

Man 2: LOL I KNOW! HES KNEES DEEP IN SMG! HES CRAWLIN' IN BIDDIES!
by PURE FUCKING ANGER December 13, 2010
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Exclamation:
shortened version of "slap my grandma"
used in place of "lol" to make you seem more "hip"
hahaa omg bro that's hilarious smg
by Billnye2 August 11, 2011
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