look up any word, like smh:
 
6.
smg
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
 
1.
smg
Acronym for sub-machine gun
by Zutroy April 27, 2003
 
2.
SMG
Suck My Gooch
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
 
3.
smg
acronym for "Swag Master General"
"yo man did you see SMG tonght, she had sooo much swag"
by Mayhem Swag December 04, 2011
 
4.
SMG
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
 
5.
smg
Acronym for "suck my genitials". Assosiated with sex, sucking a man's penis.
Girl: Fuck off!
Guy: smg
by MLP:FiM FTW! May 19, 2012
 
7.
SMG
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