"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.
The spelling of the sound of flatulence. (Onomatopoeia)
Can also be spelled "pbrbrbrbt" to describe an extended episode of gastric relief, or "pblblblbt" for gas with a deeper tone.
Punctuation can be added to describe gas with character, like "pbrbt?" or "PBRBT!"
Pronounciation: Place the bottom lip underneath the upper lip and force air through. Effect can also be achieved naturally by consuming various forms of legumes and waiting a few hours.