I'll be a monkey's uncle!
US /aɪl bi ə ˈmʌŋ.kiz ˈʌŋ.kl̩/
UK /aɪl bi ə ˈmʌŋ.kiz ˈʌŋ.kl̩/
1.
驚いた, まさか
an exclamation of surprise, disbelief, or astonishment
:
•
You won the lottery? Well, I'll be a monkey's uncle!
宝くじに当たったの？まあ、驚いた！
•
He actually finished the marathon. I'll be a monkey's uncle!
彼が本当にマラソンを完走したなんて。驚いた！