How do you say what up in Punjabi?

There isn't a direct equivalent of "What up?" in Punjabi that conveys the same casual, informal tone.

Here are some ways to say hello in Punjabi, depending on the context and level of formality:

Informal:

* "Kive ho?" (ਕਿਵੇਂ ਹੋ?) - This translates to "How are you?" and is a very common greeting.

* "Kya chalda?" (ਕਿਆ ਚੱਲਦਾ?) - This literally means "What is happening?", and is a more casual way of saying "What's up?".

* "Sada ?" (ਸਦਾ?) - This literally means "Always?" and is a very casual way to greet someone, similar to "What's up?".

Formal:

* "Sat Sri Akal" (ਸਤਿ ਸ੍ਰੀ ਅਕਾਲ) - This is a traditional greeting in Punjabi, meaning "Truth is the highest power".

* "Aap kive ho?" (ਆਪ ਕਿਵੇਂ ਹੋ?) - This is a more formal way of saying "How are you?".

Note: It's important to consider the context and your relationship with the person you are speaking to when choosing a greeting. If you are unsure, it is always best to err on the side of formality.