
Poop
Casual Usage
The noun 'poop' is often used informally, especially among friends or with children. 
Avoid in Formal
Avoid the noun 'poop' in formal contexts or writing; use 'feces' or 'waste' instead. 
Euphemisms Common
People often use words like 'number two' or 'go potty' as euphemisms for 'poop' to be polite. 