What does yo mean in Portuguese?

"Yo" in Portuguese doesn't have a direct translation like it does in English slang. It's not a commonly used word in standard Portuguese.

Here are some possible scenarios and what "yo" might mean:

* As an interjection: If someone is trying to get someone's attention, "yo" might be used in a similar way to "hey" or "listen up".

* Borrowed from English: It's possible someone is using "yo" as an informal way to address someone, borrowed from English slang.

* Regional slang: There's a chance "yo" might be used in specific regions of Portugal or Brazil as a slang term, but it's not widely known.

If you encounter "yo" in Portuguese, it's best to ask for clarification from the speaker. They will likely explain what they meant by it in that specific context.