holy cow
US /ˈhoʊ.li kaʊ/
UK /ˈhoʊ.li kaʊ/

1.
天哪, 我的天
an exclamation of surprise, astonishment, or excitement
:
•
Holy cow, I can't believe you actually won the lottery!
天哪,我真不敢相信你竟然中彩票了!
•
When he showed me his new car, all I could say was, "Holy cow!"
當他給我看他的新車時,我只能說:「天哪!」