What are you saying! / No way! / Come on!
Expresses disbelief or mild shock at what someone said. Slightly more emphatic than ¡qué va! Can be affectionate or genuinely surprised.
—I won the contest. —No way! Congratulations!
What are you saying! I can't believe it.
—They're going to get married. —No way! When?
What do you mean? I don't understand.
What do you say about that?