B.U.B is an acronym for "Back up Bitch". If a woman/man is in a relationship, and they don't want their girlfriend/boyfriend to know about their side chick, this is perfect for you to say!
If you have two books in a subject in school, the teacher will often refer to it as a not the a-book, but the b-book.
A short term for Basketball book.
A problem that women can suffer during their menstrual cycle (period) if they are wearing a pad. It can become bunched up and uncomfortable from walking or physical exercise.
Lauren: Damn I’ve got B.P.S. again!
Tricia: Seriously! I hate when that happens, so uncomfortable! You should go change it for another one.