Best definition
Stands for “What would Michael Phelps do?”. If you saw Michael Phelps smoking a bong and you are no

longer in puberty, and you are confused, do not be. It has been proven by experiment (i.e the olympics) that everything Michael Phelps does is a good thing.

“I caught my mom smoking pot!”

“Fret not. It’s in times like these we must ask ourselves, WWMPD? But not if you are prepubescent so check your life.”