JPBM Share definition Flag Jack Pot Bowel Movement. An unexpected amount of shit during a regular bowel movement. A feeling of relief follows the JPBM. Dude, I wouldn't go in there anytime soon! I just experienced a JPBM. JPBM by DiegoSantiago June 29, 2014 0 0 Get merch Get the JPBM mug. Buy Now — $32.95 See more merch
