It is short for 'go back to', followed by a place. Used wherever idiots flock on the internets, like forums or image boards. If someone says this to you, do not argue. You have lost. Perhaps go where they have requested. Maybe go outside and play a bit of RL, it has some sweet graphics.
1. gbt/bed.

2. Person A: OMG, you are sick and wrong. :Also, I like to fuck dogs.
Person B: gbt/gaia, furfag.

3. Person A: *inserts WTC image macro* LOL how funny is that!!hehe..
Person B: lol gbt/2001
by weeaboo May 29, 2007
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An abbreviation of Going Back To Sleep. It can be used when someone is too lazy to write the complete phrase, usually when someone wakes up due to a message and wants to go back to sleep.
N: I heard school is off because of the snow.
H: GBTS
N: Same here.
by Sad Med Student August 15, 2010
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GBT's is simply the short form for Great Big Tits or Great Big Titties.
Boy that Pam Anderson sure has GBTs.
by Anthony F August 10, 2006
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Go/Get Back to School. An acronym used when someone presents a false statement or ridiculous concept. Can also be used as a response if someone uses an unsatisfactory insult.
Aaron: The first man on the moon was Obama.
Tom: GBTS!

Joe: Justin Bieber has a cool fashion sense.
Brad: GBTS!
by TheTylerDurden January 28, 2012
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GBT refers to the size of a bitchy girls boob. Hence they are so small they could be golf balls. The word can also describe the following:
GBT otherwise known as Golf Ball Tits refer to a young and wide spread group of slutty woman who cannot yet even think of having children. Yet they dress like they are hookers and do not act much better. They are adolescent wanna-bee sexkittens with no boobs. They usually steal the crown from the more eligible Queen Bee. People look at them as vessels of beauty when really they are prostitots. It usually effects 6th-8th graders yet some sad examples can be found among 9th graders.
I feel so outed the GBTs are so much prettier than me!

Psh are you kidding, your double Ds can burn theirs any day.

AH! Them GBT are so tacky with their Abercrombie and Bitch clothes!

Oh damn! Look at that GBT's boobs, nothing there! Tragic and look at all those guys swarming around them? Are they blind?
by CheezyPumpkinPie April 14, 2009
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