"Poopy" is a word that describes something that is dirty or covered in feces. It is often used to describe something that is unpleasant or gross. Full definition
If possible, change poopy diapers on the floor of the bathroom on a spare toddler sized prefold diaper or a washable Changing Pad. (greenmountaindiapers.com)
You can also choose to use biodegradable liners avoiding any rinsing of poopy diapers. (ottawaclothdiapers.com)