Secret lingo is a type of language used by a particular group of people to communicate with each other without outsiders understanding. The two most common types of secret lingo are CANT and ARGOT. CANT is a type of secret language that is used by criminals, beggars, and vagabonds. It is often composed of words from different languages and slang terms. ARGOT is a type of secret language that is used by a particular profession or social group. It is composed of words and phrases that are specific to the group and not understood by outsiders.