BIAB
Back in a bit
Example
Sry, I have 2 go check the oven for a sec. BIAB

Related Slang
BBIAB | Be back in a bit |
BBL | Be back later |
BBS | Be back soon |
BRB | Be right back |
AFK | Away from keyboard |
TTYS | Talk to you soon |
TTYL | Talk to you later |
TTYVS | Talk to you very soon |
When you need to briefly depart from an in-person or virtual gathering for a short time, you can send the participants "BIAB." People typically use it online and in text messages.
BIAB is an abbreviated version of the longer "BBIAB" acronym. Also, it is one of several acronyms that tell a person you will be back soon. Other options include "BRB" and "BBS."
Now, "a bit" is very subjective since it could be half of an hour or half of a day. Therefore, you should clarify with the sender when they will be back if any plans depend on their arrival.