The abbreviation "bbl" typically stands for "be back later." It's commonly used in informal communication, especially in texting or chatting, to indicate that someone will leave the conversation for a while but intends to return.
The abbreviation "bbl" emerged in internet slang and texting language in the late 1990s and early 2000s. It combines the words "be," "back," and "later," serving as a way for people to quickly inform others about their temporary absence.