In Spanish, "mijo" is an informal word that people use to call their children and other kids. It can also be used as an affectionate way to refer to a friend or your significant other. Depending on the context, "mijo" might have different translations:

• As an informal way to call your kids, "mijo" is a contraction of "mi hijo" which means "my son".
• If used as an informal way to call a kid, young man or young woman, "mijo" can be translated as "boy" or "kid".
• When used as an affectionate way to call a friend or your partner, "mijo" is close in meaning to "dude" or "pal".

"Mijo" is a slang term that is popular in Mexican Spanish, but it can also be applied in other Latin American countries. It is not to be confused with "mija," which is the feminine form of "mijo" and means "my daughter" or "girl".