People usually curse to express strong emotion, mostly anger and frustration with a person, an object, or a circumstance. People use slang usually in order to fit in with a particular group. Slang is usually used in casual or humorous speech. It would not be appropriate to use slang in formal contexts such as in the business or professional world, at school, or in religious settings such as in church.
People use slang so that other people won't know what they're talking about.
Always. People started inventing slang as soon as they invented language.
Everyone uses slang. Name any famous person -- yes, they use slang, too.
100%. Everyone in the world uses slang.
If arranged correctly, isn't that a slang curse word(swearing)?
Science is always neutral; it is what people use it for, that is the blessing or curse.
It appears to me that the majority of Londoners use slang.
Yes, all of them. Everyone uses slang.
Australians do!
The word "cuss" is a slang term that means to swear or to use profane language. It is often considered informal or impolite.
"Hell" has the same meaning in "slang" as it does in any other sense. In other words, it's not a slang word. It means the Christian place of punishment after death. It has been used as a curse word for centuries. The long form of the curse is "Go to Hell," or "Damn you to Hell," but most people just say "Hell."
"Ay caramba!" is a minced oath, meaning a curse that's been changed so it doesn't sound like a curse. The word "caramba" comes from the Spanish word "carajo," a slang word for male genitalia. Just like some people don't like the word "dang," some people won't like "Ay caramba." To most people, it won't be a curse, but to some it will be.