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4.
"probability be right back"
used when you think that you will be right back but there is a small chance that you will not be able to
versedaaron:pir pbrb
soccerbabe:k
versedaaron has signed off at 12:15 am
by versedaaron July 10, 2008
 
1.
Acronym, stands for push button, receive bacon. A pictorial version is found on many public washroom hand drying devices.
The bacon machine's out of order! I pbrb'd and it just gave me hot air.
by dewert January 07, 2009
 
2.
False acronym, indicates that the writer must leave to procure a new beer. Combination of the familiar acronyms PBR and BRB.
This conversation just turned intense, and my beer just turned empty. PBRB.
by NotAdamTW September 16, 2009
 
3.
"Peeing, be right back." A bit more information than simply brb or afk. Used in chats and especially in online games where coordination between players is required.
> Are we almost ready to start this boss?
> pbrb
> Ok, make it a 2 min bio break for everyone.
by Yelof November 16, 2007