say what?
US /seɪ wʌt/
UK /seɪ wʌt/

1.
你說什麼?, 什麼?
used to express surprise or to ask someone to repeat something because you did not hear or understand it
:
•
I just won the lottery! Say what?
我剛中彩票了!你說什麼?
•
You want me to work on Saturday? Say what?
你讓我週六工作?你說什麼?