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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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