What does Anios mio mean in Spanish?

"Anios mio" is not a correct phrase in Spanish. It seems like a possible misspelling of "Años mío" which means "My years".

However, the word "años" (years) is usually used in the plural form. So, a more correct way to say "My years" would be "Mis años".

It's important to remember that "mio" is a possessive pronoun, and it needs to agree in gender and number with the noun it refers to. In this case, "años" is plural and masculine, so the correct possessive pronoun is "mis".

Let me know if you have any other questions.