Does not necessarily involve Bud Light Lime, however if someone is drinking or likes Bud Light Lime, they are a BLB.
Other qualifications range from being afraid of dogs, to talking out of your asshole, to not being able to swim or ride a bike
Basically, anywhere you feel appropriate.
So have fun with it and remember...
The only thing worse than a bitch is a Bud Lime Bitch!!!
BLB - "Yo man, can you get me a run?"
Non-BLB -"Yeah, no problem. What do you want?"
BLB - "Some Bud Light Lime, it's so delicious!"
Non-BLB - "I don't get runs for BLBs"
"Damn, they are the BLBs here."