interjection
egad
ih-GAD/ɪˈɡæd/
Expresses surprise or alarm.
Egad, that teacup is about to tip over!

Etymology
The older oath I gad softened an invocation of God into a mild exclamation. Its first element is uncertain, perhaps representing the exclamation ah.
In context
"Egad!" he cried, "who knows but this may be the solution of the mystery? Go down to the study, Belton, and bring me Nuttall’s Dictionary."
More examples
- Egad, I almost forgot your birthday!
- Egad, the basement is full of water!
- Egad, is that really the price of a sandwich?
Similar words
- wow
- Usually expresses amazement or admiration rather than alarm.
- yikes
- Expresses alarm or dismay, often about an immediate problem.