STG means Swear to god if they are annoying or bugging you and you don't like that at all
Example: Omg Bella did see what that James said on my tweet!?
Yeah, I saw I stg I'm going to fucking kill that bitch!
by Holly~Molly July 17, 2020
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1. Abbreviation: Swear to God.

2. Abbreviation (rare): something.
1. I STG it wasn't me.
2. Stg awesome is about to happen.
by JackFromTexas November 11, 2016
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“Stg” is an abbreviation for “swear to god.” ; generally means: That someone wants to make a sincere "Oath" to God regarding a situation or show great "Sincerity and/ or Conviction" to a conversation or beliefs.
1)I stg he would’ve KILLED me if he found out!
2)I work out every single day, stg!
by Definition GODDESS March 27, 2018
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I will STG.

Why would you do that?
I came in.

When you come in, STG.
by JustGreend January 05, 2021
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