by gum!
US /baɪ ɡʌm/
UK /baɪ ɡʌm/

1.
ya ampun, astaga
an exclamation of surprise or emphasis
:
•
By gum, that's a big fish!
Ya ampun, itu ikan besar!
•
Well, by gum, I never thought I'd see the day!
Baiklah, ya ampun, saya tidak pernah sangka akan melihat hari ini!