look up any word, like cleveland steamer:
 
1.
Be right back later. An extended brb (be right back) when one will be gone for longer than 5- 10 minutes.
Person A: Hey I'll brbl
Person B: ughh fine

...
...
Two Hours Later

Person A: BAK!!!
Person B: Sorry this user is not available for chat
by robotchicken August 18, 2011
4 0
 
2.
Acronym for "Blood Red Bull Level."
A guage devised to express the amount of Red Bull consumed by an individual.

similar in concept to BAL - "Blood Alcohol Level."
boy: are you ok? your leg is bouncing a mile a minute.
girl: i'm good, i just had a few Red Bulls before coming out tonight.
boy: looks like your BRBL might be over the legal limit.
by a. kilduff March 14, 2006
4 15