Bb may refer to any of the following:
1. Shorthand for Baby, bb is often used in chat and other text-based communication. Below is an example of how this could be used in chat.
I'll talk to you later bb.
2. Shorthand for bye bye, bb is a way of saying good bye in chat and other text-based communications. Below is an example of how this may be used in chat.
Shawn has disconnected.
3. BB is also an abbreviation rarely used to describe broadband.