* Diminutive of "mãe" (mother): This is the most common meaning, and it translates to "little mother" or "mommy". It's a term of endearment used for mothers, often by children.
* "Sister" (informal): This usage is less common but still exists, especially in certain regions. It's a very casual and affectionate way to address a sister.
* "Girl" (slang): This usage is more informal and can be considered somewhat slangy. It's typically used among younger people and might not be appropriate in all situations.
To understand the exact meaning of "manina" in a specific sentence or context, consider the speaker, the tone, and the surrounding words.