My dad's grandmother was Italian, so he grew up hearing some Italian even though he doesn't speak it at all. He does have a few random phrases that he remembers from being a kid. The below is my approximation of the words/sounds and what they mean.
"Tusi fata pitra?" = Who cut the cheese?
"Il cula mia u chupa li da faccia ti!" = My *ss is cleaner than your face.
I tried the second one out on a native Italian-speaking friend, and all he could make of it was, "My *ss...something...your face."
I'm curious to know what these might once have been. If you have any thoughts, I would be really interested to know what they are. Also, his grandmother was from about 40 km out of Naples if that's any help. Grazie!