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 12, 2011

SMG

Stands for "slower than manual gearbox"

Often found in BMW E46 M3's in the era when BMW could not produce a proper gearbox

Person 1 : My E46 m3 has an SMG box

Person 2 :Oh that's a shame

by Bait box July 1, 2022

SMG

Son of a Motherless Goat

SMG, that hurt! Son of a Motherless Goat, that hurt!

by OTGOGs December 8, 2020

SMG

Smacking my gum. Derivative of SMH.

Used to express:
a) Oh, really?
b) Mhm. That sounds like crap.
c) I don't believe you.
d) Shut the hell up.

Person A: I totally got three million points on BrickBreaker yesterday.
Person B: SMG.

by vicious11 January 9, 2010

SMG

a variation of suck my balls, this means Suck My Gonads. when used as a clan tag in cod (call of duty) it can be interchangeable with the term Sub-Machine Gun, for those of us who enjoy using weapons such as the p90 on xbox live.

SMG just pwned you with a p90, bahaha SMG.

by The urbster September 16, 2010

SMG

Shaking my goods

Did you see me SMG out there?

by Mark Abbott October 6, 2021

SMG

An acronym for Sick Mack Game.

Man, Tim really has an SMG lately, he's hooking up with everyone.

by thetogurtcannon January 30, 2011