Poop/puːp/ Definition 1 of 4Pro Tip 1/3Casual Usage The noun 'poop' is often used informally, especially among friends or with children. Did you step in poop while playing outside? Pro Tip 2/3Avoid in Formal Avoid the noun 'poop' in formal contexts or writing; use 'feces' or 'waste' instead. The nurse noted the patient's waste disposal in the chart. Pro Tip 3/3Euphemisms Common People often use words like 'number two' or 'go potty' as euphemisms for 'poop' to be polite. The little boy needed to go potty during the trip.