The slang term "poo-poo" is often used to refer to feces or the act of going to the bathroom. However, there are many other words and phrases that can be used to describe this bodily function. Some popular synonyms for "poo-poo" include poop, dookie, turd, excrement, fecal matter, waste, stool, and bowel movement. There are also more playful and creative terms like log, number two, brownies, chocolate thunder, and bum dumplings. It's important to remember that while these words may be used casually in certain settings, it's important to use appropriate language in public and professional situations.