Looking for the Lyrics to an Italian Lullaby?

I am looking for the lyrics to an Italian lullaby my grandmother used to sing to my mother, and that my mother used to sing to me. My mom still sings it to my daughter, but we're not sure we have the words right. I know how it begins, so I'll try to type it kinda phonetically: "Fall-y nonni su-ko si, trenta pit-e for de li, el en sol-e figi sicci, perecome pa-something, puta lit-e..." Bad, I know, but hopefully someone catches my drift. If I remember correctly, the song is kinda gross. Let's just say it's about a child having an 'accident' in bed. Sound familiar? Anyone?