According to various sources, "dang" is an informal word that can be used as an interjection, adverb, adjective, or verb. Its meaning can vary depending on the context and the speakers intention. Here are some of the definitions and examples found in the search results:

• Interjection: Used to express dissatisfaction or annoyance. Used as a more polite form of "damn".
• Adverb: Used, especially when you are annoyed, to mean "very".
• Adjective: A euphemistic word for "damn" or "damned".
• Verb: To damn. Used as a more polite form of "damn".

Overall, "dang" is a slang word that can be used to express a range of emotions, from annoyance to surprise. Its usage is informal and may not be appropriate in all situations.