What Does Damn Mean in Slang?

slang an exclamation of annoyance (often in exclamatory phrases such as damn it! damn you! etc) informal an exclamation of surprise or pleasure (esp in the exclamatory phrase damn me!)

Is the word damn a cuss word?

This is because Damn is considered a swear word in English, for historical and religious reasons (as SamBC mentioned earlier). When you want to say a swear word, but don't want to be offensive, people create "Minced Oaths".

What does damn girl mean?

Damn woman (don't you think you've gone too far?): Cursed, bloody, stupid woman (you have gone too far!) idiom.