- The definition of poo poo is a children’s word for poop or excrement.
An example of poo poo is what a child sometimes has in their diaper.
- Poo poo is defined as to dismiss an idea or suggestion.
An example of poo poo is when someone invites coworkers to a bar but another person says the idea is no good.
poo-poo definition by Webster's New World
Slang excrement: a child's term, now also used in other contexts