What does hey is up mean in spanish?

There isn't a direct, literal translation for "Hey, what's up?" in Spanish that captures the same informal, casual tone. However, here are some common options depending on the context and level of formality:

Informal:

* ¿Qué onda? (This is very casual, like "What's up?")

* ¿Qué tal? (This is a bit more formal but still casual, like "How are you?")

* ¿Cómo estás? (This is the most common and formal way to ask "How are you?", but can be used casually)

* ¿Qué pasa? (This is a more literal translation of "What's up?" but can sometimes sound a bit harsh)

* ¿Qué hay? (This is a very casual way to say "What's up?" and is usually used among friends)

Formal:

* ¿Cómo está usted? (This is the formal way to ask "How are you?")

You can also add "Hey" before any of these phrases, such as "Hey, ¿qué onda?" or "Hey, ¿cómo estás?"

It's important to note that the most appropriate phrase will depend on the context and your relationship with the person you are talking to. For example, if you are talking to a close friend, you can use "Hey, ¿qué onda?" but if you are talking to a coworker, it's best to use "Hey, ¿cómo estás?"