it's all Greek to me
US /ɪts ɔl ɡriːk tu mi/
UK /ɪts ɔl ɡriːk tu mi/

1.
itu semua bahasa Yunani bagi saya, tidak dapat dimengerti
something that is incomprehensible or unintelligible to someone
:
•
I tried to read the instruction manual, but it's all Greek to me.
Saya mencoba membaca buku petunjuk, tapi itu semua bahasa Yunani bagi saya.
•
When they started talking about quantum physics, it was all Greek to me.
Ketika mereka mulai berbicara tentang fisika kuantum, itu semua bahasa Yunani bagi saya.