A Batt Share definition Flag A person that takes a poo in the shower and then breaks it up with their toes so it can easily be washed away. Tommy did a Batt last night. It smelt awful and took a while to clean up. A Batt by TheBattrickPoos June 1, 2018 0 0 Get merch Get the A Batt mug. Buy Now — $32.95 See more merch