This is not a Tagalog term, though young Filipinos often use it online.
It’s the English acronym BRB, which stands for “Be right back.”
This is used when the person has to leave the computer for a bit. It could also be used when the person abruptly becomes occupied or busy with something and has no time to focus on a chat he/she was engaged in.
The person often intends to return to the conversation as soon as possible or in a short while.
Babalik rin ako agad.
