Yeah, it's just a matter of pronounciation. My dad was fluent so he'd say things that I couldn't for the life of me understand. He'd actually laugh at the way I pronounced some things. It's like in endlish when you say things real fast like D'jit jet? It's actually Did you eat yet. A fluent Italian is going to rattle off stuff in Italian that are going to fly right by us.
My favorite is capocolla which many people (including those who do closed captioning) gabagool.