Women can use this term and acronym as a description of their chest size usually C cup or Larger. Triple B is a fictitious breast size, yet a humorous term for a full and juicy breast size.
Example 2 - Im 5'2, brunette and my titties are a triple B threat.
Used in a sentence:
Her boobs are so bountiful, her chest is a triple B treat.
I want to jack off all over those Triple B's. Then I want to jack off on them again.