Dang (interjection)

1. An exclamation of mild annoyance or frustration.
2. A mild swear word used to express disappointment or mild annoyance.

Origin:

Of uncertain origin, though likely to have originated in the united states in the 19th century. it is possibly a variant of darn, which is a milder form of damn.

Examples:

1. Dang it! I forgot my keys.
2. Dang, I missed my train.
3. Dang, I broke my phone.
4. Dang, that's too bad.
5. Dang, I was so close to winning.