Here's a breakdown of the phrase:
* Por qué: This means "why" in Spanish.
* No: This means "not."
* Mija: This is a term of endearment, often used by mothers or older women to address young women. It comes from "mi hija," which literally means "my daughter" but is often used as a term of affection for any young woman.
So, the overall meaning of "Por qué no mija" is something like:
* "Why not, sweetheart?"
* "Go for it, honey!"
* "Don't be afraid, sweetie."
It's a phrase that conveys encouragement, support, and a sense of confidence.