How do you say wassup in polish?

There's no direct equivalent for "wassup" in Polish. It's a very informal greeting, and depending on the context, you could use:

For a casual greeting among friends:

* "Co tam?" (pronounced "co tam") - literally "What's there?"

* "Co u Ciebie?" (pronounced "co oo tshebye") - "What's up with you?"

* "Siema!" (pronounced "she-ma") - a very informal greeting, similar to "yo" or "hey" in English

* "Elo!" (pronounced "eh-lo") - another very informal greeting, even more casual than "siema"

If you want to be a little more formal:

* "Cześć!" (pronounced "che-shch") - "Hello"

* "Dzień dobry!" (pronounced "dzen dob-ree") - "Good day!"

* "Co słychać?" (pronounced "co sleh-hat") - "What's new?"

The best choice depends on the situation and your relationship with the person you're talking to.