Pistoss

We are at a restaurant and I ask Conrad how he likes his dinner. He turns his head and says, “Well, it’s just a little pistoss.” Claire seems to understand perfectly, so I ask her what “pistoss” is. She tells me it’s just a word that Conrad has been using lately. I ask Conrad what “pistoss” means and he answers, “Pistoss means stupid.” We told the kids not to use the word “stupid” when talking about people, so Conrad made up his own.