say what?
US /seɪ wʌt/
UK /seɪ wʌt/

1.
apa katamu?, apa?
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?
Aku baru saja memenangkan lotre! Apa katamu?
•
You want me to work on Saturday? Say what?
Kamu ingin aku bekerja pada hari Sabtu? Apa katamu?