GBL 

a rare drug taken to metabolise into GHB which can cause similar effects to alcohol.
tastes like paint stripper

Person 1: want some GBL
Person 2: i think ill have a fruit bag

GBL by realtackshooter August 2, 2023

GBL 

The Go Battle League in Pokémon Go. A feature that was introduced in January 2020 where one can play 3v3 PVP matches against competitive, online opponents. Players are typically limited to 25 matches per day, but this limit can increase for special events.

Friend: How did you do in GBL today?

Pokémon GO Addict: It was terrible! I only went 9-16 today!

GBL by MathWizard534 April 7, 2022

gbl 

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).

gbl by K-TROOPER August 27, 2006

GBL 

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.

GBL by James Meeker September 17, 2006

GBL 

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

GBL by bigboybunsie October 7, 2010

GBL 

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

GBL by hahamaine March 4, 2009

GBL 

Gut Busting Laughter: an alternative to LOL

Dude, I GBL'd at that epic fail!

GBL by Ljk777 December 25, 2012