plumbled Share definition Flag 1. the blending of the last name of NBA player Mason Plumblee and humble. Example of being Plumbled: LeBron James was denied by Mason Plumlee on a potential game-winning dunk as the Brooklyn Nets beat the Miami Heat 88-87. plumbled by Grant Rice May 25, 2014 0 0 Get merch Get the plumbled mug. Buy Now — $32.95 See more merch