A cute term for shit, manure, poo. I first heard the character Randy (the fat borderline retarded) brother on "My Name Is Earl" use this to refer to cow shit.
Earl, he made his hut out of cow ploppies. No woner why it has that smell!
When I cleaned my kitten's litter pan, she left a lot of ploppies because I fed her too much people food.
A milky type of poo that makes a plop sound in the toilet and only done by children, especially obese schoolboys
Mummy I feel sick and I have to go toilet to do my ploppies!