yes what?

A phrase used by a senior class in Israel. it is equivalent to the English phrase "what's wrong with you".
when something stupid or not connected to the world is said, the most suitable reply will be:"yes what?"
The origin of the phrase was founded by a Syrian Arab student in Israel known only as Saeed.

A:"Eli!!!!"
B:"Yes what???"

A is digging to B and B then answers:"yes what?"