Its short for baby.

the whale tail is the shape formed when a g-string rides up high over a womans trousers

Netspeak for baby, most likely used at the end a phrase as an added emphasis or exaggeration.

Short for "baby".
Usually used on the internet on forums, comments, profiles, messages, IMs etc.

A pet name for friends meaning 'baby'. An exclusive word that can only be used by people of certain ranking.
The word 'bb' originated in the mid New Hampshire Dartmouth area.

Short for baby or beebee used in a humor sense.