GSB
Another word for "geekstinkbreath", a Green Day site and message board community. www.geekstinkbreath.net
It is well known for it's slashers and "Teenie vs Original" fights.
Oh fuck, the GSB mods are more vicious today than the time they killed the Mike Mafia.
by MiaTheCat October 13, 2005

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Top Definition
GSB
grow some balls
guy 1: man i wanna go talk to that girl...but i'm scared
guy 2: dude gsb it's not even that serious
by getsmart July 26, 2010

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GSB
An abbreviation for Get Some Brain.
Bill "What are you doing tonight"
Bob "Oh Im hangin with that chick Jane"
Bill "Nice dude GSB"
Bob "Ill try"
by Duckswin March 19, 2009

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gsb
Grab Some Bench
Be lazy, do nothing, relax
I'm gonna sit here and GSB.
by OGRE T December 29, 2007

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GSB
an abbreviation for gay / str8 / bi, often used in instant messages

q: so, what ru GSB?
a: S
by ubernostrum December 29, 2005

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an acronym for get some butt. commonly referred to when going to a party with a large amount of women.
dude well go to this party and defintiely G.S.B. , dude G.S.B fa sho tonight
by IndianaPimpin219 February 20, 2011

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GSB
Geek Stink Breath: Extremely bad breath similar to that of a geek who has stink breath.
Brush your teeth Mick, You have GSB
by yamumsdead November 19, 2005

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