Oh my God! (Common exclamation — also 'astaga' or 'ya Tuhan'.)
Diam! / Diam, dong!
Be quiet! / Shut up! ('Dong' softens commands a bit — a very Indonesian particle.)
Kamu bercanda?
Are you kidding me?
Kamu serius?
Are you serious?
Kenapa serius banget?
Why so serious? ('Banget' = very (colloquial); 'sekali' is the standard equivalent.)
Biar saya pikir dulu.
Let me think. ('Dulu' = 'first/for now' — adds 'just a moment' feeling.)
Ya Tuhan!
For God's sake!
Sayang sekali.
What a pity. ('Sayang' has three lives: love, darling, AND pity/waste.)
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