A phrase made popular by Tim Tebow who is the current quarterback for the Denver Broncos, and known for his Christian faith.

Go Broncos + God Bless= GB²
"Another all-around awesome team win! I thank the Lord to be lining up every Sunday with such great men GB2" -Tim Tebow
by Wayfinder December 16, 2011
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1: An acronym for "GameBreaker 2" from NBA Street Vol. 2, in which an unstoppable team stunt was performed, adding several points to the user's team while taking points away from the user's opponents.

2: an acronym for "go back to", commonly used on 4chan. Usually followed by a letter or word in between two slashes (for example /b/ or /school/), to tell one where to go in the poster's opinion. the two slashes stand for how the letters of 4chan sections are between 2 slashes (like /h/ or /b/), representing how they are shown on the URL.
Example for definition 1:
"Yo! I pulled a phat gb2! Your ass is done!"
Examples for definition 2:
EXAMPLE A
"Futanari doesn't belong on /h/! gb2/d/, n00b!"
EXAMPLE B
"You can't spell worth shit! gb2/school/!"
by Hand Hanzo June 4, 2005
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Used primarily on 4chan, telling another user to get off of the current board, and to take his thread to another.
Poster 1:OMG luks: Nurse Joy on Officer Jenny! *fap fap fap*

Poster 2: Nub, gb2/u/
by The Ivan May 19, 2007
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In reference to the internet image board 4Chan, refers to moving a discussion to a certain board on the site. In gb2/b, for instance, the user is telling another user to move a discussion to /b, one of the several boards on the site. This is used when the discussion is completely out of context to a select section's subject matter.
by Mel December 21, 2004
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A common phrase on 4chan.

When a poster makes a thread on one of 4chan's niche boards that doesn't follow the theme of the board, or makes an incredibly stupid and/or immature (and unfunny) comment (eg: being racist, saging for no good reason, using "your mom") they will be told

by the masses to Go Back To /b/ (or Gb2/b/)
Thread: "This chick (insert picture of black girl here) asks you out on a date, what do you do?"

Anonymous: "LOLNO NIGGERS GOT AIDS"

Other Anon: "Gb2 /b/"
by JFGDS May 31, 2009
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