Busted mustard Share definition Flag Yellowish-brown exploding diarrhea cusued by a night of beer drinking and eating spicy food. "That brew and those jalapeno pepper nachos painted my toilet with Busted Mustard!" Busted mustard by The Royce Ronson December 28, 2019 0 0 Get merch Get the Busted mustard mug. Buy Now — $32.95 See more merch