Jargon and Slang

Slang is the modification and way to speak in an informal conversation of a specific group of people, it's usually used by people with low culture and education, usually gangs and youngsters use this kind of speech.

And Jargon is pretty close to slang though it's of a specific group of people that uses a type of language that it's just known by their group, though it's not informal, it's used usually on works, as medics, lawyers, chefs...