BWWBs

I have recently been introduced to a new acronym which I have since added to my working vocabulary: BWWBs. Any guesses from peanut gallery? If you are a DINK, plan for when you are a BWWB. If you are already a BWWB, then I imagine you are aware of the lifestyle change. This newly coined acronym (at least I think it is newly coined) is already on the internet, see the following link. Does anyone else have any new and interesting acronyms?