what's up

what's up or what's cooking also what's doing  {slang}

What is happening or planned; what is wrong. — Often used as a greeting.

"What's up?" asked Bob as he joined his friends. "Are you going to the movies?"

What's cooking? Why is the crowd in the street?

What's doing tonight at the club?

Hello Bob, what's up?

Compare: WHAT'S WITH.