interjection
blimey
BLY-mee/ˈblaɪmi/
An exclamation expressing surprise or annoyance, or adding emphasis.
“Blimey!” the woman exclaims as toast springs from the toaster.

Etymology
The pieces probably come from the oath “(God) blind me!” This call for blindness upon oneself became an exclamation of surprise, shock, or mild annoyance.
In context
The water is over 20 ft down. Blimey, that is That is deep.
More examples
- The British character says “blimey” when he sees the bill.
- “Blimey, you're early,” she says, opening the door.
- He mutters “blimey” after missing the train.
Similar words
- wow
- A more usual American exclamation of surprise.
- good grief
- Expresses dismay without the distinctively British flavor.