not know what hit you
US /nɑt noʊ wʌt hɪt ju/
UK /nɑt noʊ wʌt hɪt ju/
1.
不知所措, 完全被震惊
to be completely surprised or overwhelmed by something, often something negative or sudden
:
•
When the market crashed, many investors didn't know what hit them.
当市场崩溃时，许多投资者不知所措。
•
The boxer landed a punch so fast, his opponent didn't know what hit him.
拳击手出拳太快，他的对手不知所措。