A nonstandard split spelling of “io, ” meaning “I”; in standard Italian, it is written as one word.
I o mi sono buttata, ora tocca a voi.
I took the plunge, now it’s your turn.
— Addio mia concubina (1993)
I o sono sempre stato meno che niente.
I have always been less than nothing.
— Addio mia concubina (1993)