mud flaps Share definition Flag When somebody's puppet or 'diarrhea' is on your flaps... protection needed. Everytime I see him I need a car wash, you'd wish it was just the mud flaps!! His mud is like diarrhea!! mud flaps by Jesyca September 8, 2019 0 0 Get merch Get the mud flaps mug. Buy Now — $32.95 See more merch