by gum!
US /baɪ ɡʌm/
UK /baɪ ɡʌm/

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