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Gamma-Butyrolactone. A precursor to GHB; it is converted to GHB upon entering the body. Usually in a dropper bottle and squirted into some type of liquid.
Yo who's got squirts? I'm down for some beee ellll(GBL).
by K-TROOPER August 27, 2006
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Gambled But Lost: You think it's a fart, but it's not.
Dude! I just had a GBL. I need to go change my underwear AND my pants.
by James Meeker September 16, 2006
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Genuine Belly Laugh, Can be instead of LOL in times of extreme Hilarity
That was some funny Sh*t GBL, There will be lots of GBLs
by bigboybunsie October 06, 2010
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A ghetto belt loop. One that has detached from either the top or bottom but is still on the pair of pants.
"Dude check out that girls pants"-Ben T
"Haha ya nigga she got a GBL"- Ben K

by hahamaine March 04, 2009
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A accronym for gay bisexual and lesbian excluding the transexual community fro one reason or another
The GBL community now accepts being called gay rather then the transgendered community not wanting to be called trannies.
by madasue September 18, 2006
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"Green Blinking Lights" - synonym for network connectivity, named for the green blinking lights on routers, switches, NICs and other devices. When you have GBL, it's a good thing.
Woohooo, plugged in my new wifi router and got instant GBL.
by MC Johnny P August 18, 2011
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