STG 

Sexually Transmitted Glitter- Normally happens when you have sex with a stripper or glitter skanks

Guy 1- "did u hear about Shawn?? Yea he hooked up with that stripper Sapphire the other night, his face looks like he got Glitter Bombed"

Guy 2- "Yea man, he got a STG"

STG by slickjmk August 11, 2012

STG 

Coming from the phrase "I'd smash the granny out of that", the Smash The Granny is abbreviated to STG, meaning any Fit, shaggable girl in the vicinity.

Steve! Steve!
What?
STG dude, behind you!
Whoa!

STG by Andy June 16, 2004

STG 

Aptly stands for 'Super Tan Girl'; a combination of a Gina and Valley Girl into one entity. Usually blonde, but is based on the overexcessive and obvious fake bake the girl has undergone.

Also associated with the more popular crowd, but not necessarily meaning that they are.

"Do you think that she went on vacation?"
"No, she's just an STG"

or

"That girl over there is such an STG"
"tell me about it, she could support the whole bronzing industry single-handedly"

STG by fos_oleg January 9, 2010

stg 

(-noun -abbreviation)
stg stands for 'small tits girl'. Generally used to describe a female person (or virtual character) with small-sized breasts.

The abbreviation can (relatively) safely be used among friends in public places, without raising suspicion of the person in question.

(First seen being used in source-code of some game as a reference to a female npc)

person A: Hey, you see that stg at 3 o'clock?
person B: That blonde? Yeah, so?
Person A: She's cute!
Person B: Dude... why do you always go mental about planks?

stg by Mister G July 8, 2010

STG 

Sexually Transmitted Glitter - glitter that rubs on to you during any intimate contact with your partner.

"Last night was awesome, but I got a serious case of STG!"

STG by Z-Person March 15, 2008

STG 

Its am Anagram for Stupid Teenage Girl.

Why are there so many STG's out there!

STG by shades6699 November 22, 2011

STG 

An abbreviation for the amazing Los Angeles based electronica/indie/synthpop band, called Shiny Toy Guns.

Members include Chad Petree for vocals and guitar, Carah Faye for voices and vocals, Jeremy Dawson for synths and basses and Mikey Martin for drums.

Did you see STG's show last night? It was AMAZING!!

STG by stgrule January 18, 2008