Akademik

n.

A collection of words and phrases used to exclude outsiders from a particular group and to disguise the group's activities.

"Mobspeak is a language that grows out of secrecy, and who can be more secret than the Mafia? The anti-social nature of the Mob is the perfect breeding ground for an 'Antilanguage'."

— Bryan McLucas, "Mobspeak: The Language of the Mafia"