It is an abbreviation for "swear to god"
U realy Got expelled?
Yea, STG.
by DJ January 25, 2005
1.the acronymn to swear to god
2.respecting every thing you say or do.
3.three letters that should be wore on rings neckales's
like crosses.
s.t.g.----stg------
by regardless devon victory May 12, 2010
An abbreviation for Something To Google, usually used when asked a question you don't know the answer to.
Patrick: Hey what's shea butter?
Brian: IDK, that's S.T.G!!!
by Optomis Primo Levi January 07, 2009
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"
by slickjmk March 23, 2012
Its am Anagram for Stupid Teenage Girl.
Why are there so many STG's out there!
by shades6699 June 05, 2011
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"
by fos_oleg January 09, 2010
Spotted the Gay! Used to say that you see a homosexual person......without them knowing.
Miguel: Aye do you see that guys hair over there?

Habib: Yeah it is highlighted and spikey!

Miguel: I wish I had hair like him...

Habib: Me too

(Homosexual guy walks buy)

Habib and Miguel: STG!!!!!!!

Habib: Good thing we said STG because if we screamed "GAY" I think he would be offended.
by ineedabettersn2 August 26, 2009

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