What does BWPWAP mean or stand for ?

BWPWAP is the short form for describing the erstwhile last planet of our solar system.Until recently Pluto was designated a planet that revolved around the sun.However there had been an ongoing debate to demote its title to a satellite of Neptune or just another heavenly body that revolved around the sun.

The fact of the matter is that Pluto is way too small to be considered a planet,and there are many other cosmic rocks that revolve around the sun and are not considered planets.Due to this we use the phrase BWPWAP.