What does BB mean Grindr?

Excuse me, could you possibly clarify something for me? I've noticed that some users on Grindr are using the abbreviation 'BB' quite frequently, but I'm not quite sure what it stands for. Could you perhaps enlighten me as to the meaning of 'BB' in Grindr? Is it some sort of slang or shorthand that's commonly used within the Grindr community? I'm really curious to know what it means and how it's being used in context. Thank you in advance for any assistance you can provide.